The OpenVPN community project team is proud to release OpenVPN 2.6.14. This is a bugfix release containing one security fix.
For details see Changes.rst
Security fixes:
CVE-2025-2704 fix possible
Security scope:
OpenVPN servers between 2.6.1 and 2.6.13 using
Windows MSI changes since 2.6.13:
Built against OpenSSL 3.4.1 Included openvpn-gui updated to 11.52.0.0 Use correct Disable config in menu listing if its ovpn file becomes inaccessible (github #openvpn-gui#729)
For details see Changes.rst
Security fixes:
ASSERT() on OpenVPN servers using --tls-crypt-v2Security scope:
--tls-crypt-v2 can be made to abort with an ASSERT() message by sending a particular combination of authenticated and malformed packets. To trigger the bug, a valid tls-crypt-v2 client key is needed, or network observation of a handshake with a valid tls-crypt-v2 client key. No crypto integrity is violated, no data is leaked, and no remote code execution is possible. This bug does not affect OpenVPN clients. (Bug found by internal QA at OpenVPN Inc)Windows MSI changes since 2.6.13:
%TEMP% directory for debug log file.The OpenVPN community project team is proud to release OpenVPN 2.6.13. This is a bugfix release.
For details see Changes.rst
Feature changes:
on non-windows clients (MacOS, Linux, Unix) send "release" string from Windows: protect cached username, password and token in client memory (using the Windows: use new API to get dco-win driver version from driver (newly introduced non-exclusive control device) (github ovpn-dco-win#76) Linux: pass
Security fixes:
improve server-side handling of clients sending usernames or passwords longer than
Notable bug fixes:
FreeBSD DCO: fix memory leaks in nvlist handling (github #636) purge proxy authentication credentials from memory after use (if
Windows MSI changes since 2.6.12:
Built against OpenSSL 3.4.0 Included openvpn-gui updated to 11.51.0.0 Higher resolution eye icons (github openvpn-gui#697) Support for concatenating OTP with password Optionally always prompt for OTP Fix tooltip positioning when the taskbar is at top (github openvpn-gui#710) Debian/Ubuntu packages in OpenvpnSoftwareRepos are now available for Ubuntu 24.10 (oracular)
For details see Changes.rst
Feature changes:
uname() call as IV_PLAT_VER to server - while highly OS specific this is still helpful to keep track of OS versions used on the client side (github #637)CryptProtectMemory() windows API)--timeout=0 argument to systemd-ask-password, to avoid default timeout of 90 seconds ("console prompting also has no timeout") (github #649)Security fixes:
USER_PASS_LEN - this would not result in a crash, buffer overflow or other security issues, but the server would then misparse incoming IV variables and produce misleading error messages.Notable bug fixes:
--auth-nocache is in use)Windows MSI changes since 2.6.12:
The OpenVPN community project team is proud to release OpenVPN 2.6.12. This is a bugfix release.
For details see Changes.rst
Bug fixes:
the fix for CVE-2024-5594 (refuse control channel messages with nonprintable characters) was too strict, breaking user configurations with AUTH_FAIL messages having trailing CR/NL characters. This often happens if the AUTH_FAIL reason is set by a script. Strip those before testing the command buffer (github #568). Also, add unit test. Http-proxy: fix bug preventing proxy credentials caching (trac #1187)
Windows MSI changes since 2.6.11:
Built against OpenSSL 3.3.1 Included openvpn-gui updated to 11.50.0.0 Update Italian language (github #696)
For details see Changes.rst
Bug fixes:
Windows MSI changes since 2.6.11:
The OpenVPN community project team is proud to release OpenVPN 2.6.11. This is a bugfix release containing several security fixes.
For details see Changes.rst
Security fixes:
CVE-2024-4877: Windows: harden interactive service pipe. Security scope: a malicious process with "some" elevated privileges (SeImpersonatePrivilege) could open the pipe a second time, tricking openvn GUI into providing user credentials (tokens), getting full access to the account openvpn-gui.exe runs as. (Zeze with TeamT5) CVE-2024-5594: control channel: refuse control channel messages with nonprintable characters in them. Security scope: a malicious openvpn peer can send garbage to openvpn log, or cause high CPU load. (Reynir Björnsson) CVE-2024-28882: only call schedule_exit() once (on a given peer). Security scope: an authenticated client can make the server "keep the session" even when the server has been told to disconnect this client (Reynir Björnsson)
New features:
Windows Crypto-API: Implement Windows CA template match for searching certificates in windows crypto store. Support pre-created DCO interface on FreeBSD (OpenVPN would fail to set ifmode p2p/subnet otherwise)
Bug fixes:
Fix connect timeout when using SOCKS proxies (trac #328, github #267) Work around LibreSSL crashing on OpenBSD 7.5 when enumerating ciphers (LibreSSL bug, already fixed upstream, but not backported to OpenBSD 7.5, see also LibreSSL/OpenBSD#150) Add bracket in fingerprint message and do not warn about missing verification (github #516)
Documentation:
Remove "experimental" denotation for --fast-io Correctly document ifconfig_* variables passed to scripts Documentation: make section levels consistent Samples: Update sample configurations (remove compression & old cipher settings, add more informative comments)
Windows MSI changes since 2.6.10:
For the Windows-specific security fixes see above Built against OpenSSL 3.3.1 Included openvpn-gui updated to 11.49.0.0
Note: Windows MSI was updated to I002 on June 26th. Changes in I002:
Group names are localized in some localizations, so we have to use SIDs. (Github: #671)
For details see Changes.rst
Security fixes:
New features:
Bug fixes:
Documentation:
Windows MSI changes since 2.6.10:
- Contains part of the fix for CVE-2024-4877
Note: Windows MSI was updated to I002 on June 26th. Changes in I002:
The OpenVPN community project team is proud to release OpenVPN 2.6.10. This is a bugfix release containing several security fixes specific to the Windows platform.
For details see Changes.rst
Security fixes:
New features:
User visible changes:
Bug fixes:
Documentation:
Windows MSI changes since 2.6.9:
Note: Windows MSI was updated to I002 on April 15th. Changes in I002:
Note: Windows MSI was updated to I003 on May 23rd. Changes in I003:
For details see Changes.rst
Security fixes:
- CVE-2024-27459: Windows: fix a possible stack overflow in the interactive service component which might lead to a local privilege escalation. Reported-by: Vladimir Tokarev <vtokarev@microsoft.com>
- CVE-2024-24974: Windows: disallow access to the interactive service pipe from remote computers. Reported-by: Vladimir Tokarev <vtokarev@microsoft.com>
- CVE-2024-27903: Windows: disallow loading of plugins from untrusted installation paths, which could be used to attack
openvpn.exevia a malicious plugin. Plugins can now only be loaded from the OpenVPN install directory, the Windows system directory, and possibly from a directory specified byHKLM\SOFTWARE\OpenVPN\plugin_dir. Reported-by: Vladimir Tokarev <vtokarev@microsoft.com> - CVE-2024-1305: Windows TAP driver: Fix potential integer overflow in TapSharedSendPacket. Reported-by: Vladimir Tokarev <vtokarev@microsoft.com>
New features:
t_client.shcan now run pre-tests and skip a test block if needed (e.g. skip NTLM proxy tests if SSL library does not support MD4)
User visible changes:
- Update copyright notices to 2024
Bug fixes:
- Windows: if the win-dco driver is used (default) and the GUI requests use of a proxy server, the connection would fail. Disable DCO in this case. (Github: #522)
- Compression: minor bugfix in checking option consistency vs. compiled-in algorithm support
- systemd unit files: remove obsolete syslog.target
Documentation:
- remove license warnings about mbedTLS linking (README.mbedtls)
- update documentation references in systemd unit files
- sample config files: remove obsolete tls-*.conf files
- document that auth-user-pass may be inlined
Windows MSI changes since 2.6.9:
- For the Windows-specific security fixes see above
- Built against OpenSSL 3.2.1
- Included tap6-windows driver updated to 9.27.0
- Security fix, see above
- Included ovpn-dco-win driver updated to 1.0.1
- Ensure we don't pass too large key size to CryptoNG. We do not consider this a security issue since the CryptoNG API handles this gracefully either way.
- Included openvpn-gui updated to 11.48.0.0
- Position tray tooltip above the taskbar
- Combine title and message in tray icon tip text
- Use a custom tooltip window for the tray icon
Note: Windows MSI was updated to I002 on April 15th. Changes in I002:
- Update include ovpn-dco-win to v1.1.1
- Improves reconnect behavior after hibernate/standby. (Github: #64)
Note: Windows MSI was updated to I003 on May 23rd. Changes in I003:
- Update include ovpn-dco-win to v1.2.1
- Fix bug check in timer management routines. (Github: #70)
The OpenVPN community project team is proud to release OpenVPN 2.6.9. This is a bugfix release containing one security fix for the Windows installer.
For details see Changes.rst
Security fixes:
New features:
User visible changes:
Notable bug fixes:
Windows MSI changes since 2.6.8:
For details see Changes.rst
Security fixes:
- Windows Installer: fix CVE-2023-7235 where installing to a non-default directory could lead to a local privilege escalation. Reported by Will Dormann.
New features:
- Add support for building with mbedTLS 3.x.x
- New option
--force-tls-key-material-exportto only accept clients that can do TLS keying material export to generate session keys (mostly an internal option to better deal with TLS 1.0 PRF failures). - Windows: bump vcpkg-ports/pkcs11-helper to 1.30
- Log incoming SSL alerts in easier to understand form and move logging from
--verb 8to--verb 3. - protocol_dump(): add support for printing
--tls-cryptpackets
User visible changes:
- License change is now complete, and all code has been re-licensed under the new license (still GPLv2, but with new linking exception for Apache2 licensed code). See COPYING for details.
- Code that could not be re-licensed has been removed or rewritten.
- The original code for the
--tls-export-certfeature has been removed (due to the re-licensing effort) and rewritten without looking at the original code. Feature-compatibility has been tested by other developers, looking at both old and new code and documentation, so there *should* not be a user-visible change here. - IPv6 route addition/deletion are now logged on the same level (3) as for IPv4. Previously IPv6 was always logged at
--verb 1. - Better handling of TLS 1.0 PRF failures in the underlying SSL library (e.g. on some FIPS builds) – this is now reported on startup, and clients before 2.6.0 that can not use TLS EKM to generate key material are rejected by the server. Also, error messages are improved to see what exactly failed.
Notable bug fixes:
- FreeBSD: for servers with multiple clients, reporting of peer traffic statistics would fail due to insufficient buffer space (Github: #487)
Windows MSI changes since 2.6.8:
- Security fix, see above
- Built against OpenSSL 3.2.0
- Included openvpn-gui updated to 11.47.0.0
- Windows GUI: always update tray icon on state change (Github: #669) (for persistent connection profiles, "connecting" state would not show)
The OpenVPN community project team is proud to release OpenVPN 2.6.8. This is a small bugfix release fixing a few regressions in 2.6.7 release.
For details see Changes.rst
User visible changes:
Bug fixes:
Windows MSI changes since 2.6.7:
For Community-maintained packages for Linux distributions see OpenvpnSoftwareRepos
For details see Changes.rst
User visible changes:
- Windows: print warning if pushed options require DHCP (e.g. DOMAIN-SEARCH) and driver in use does not use DHCP (wintun, dco).
Bug fixes:
- SIGSEGV crash: Do not check key_state buffers that are in S_UNDEF state (Github #449) - the new sanity check function introduced in 2.6.7 sometimes tried to use a NULL pointer after an unsuccessful TLS handshake
- Windows:
--dnsoption did not work when tap-windows6 driver was used, because internal flag for "apply DNS option to DHCP server" wasn't set (Github #447) - Windows: fix status/log file permissions, caused by regression after changing to CMake build system (Github: #454, Trac: #1430)
- Windows: fix
--chdirfailures, also caused by error in CMake build system (Github #448)
Windows MSI changes since 2.6.7:
- Included openvpn-gui updated to 11.46.0.0
For Community-maintained packages for Linux distributions see OpenvpnSoftwareRepos
The OpenVPN community project team is proud to release OpenVPN 2.6.7. This is a bugfix release containing security fixes.
For details see Changes.rst
Security Fixes:
User visible changes:
New features:
Windows MSI changes since 2.6.6:
For Community-maintained packages for Linux distributions see OpenvpnSoftwareRepos
For details see Changes.rst
Security Fixes:
- CVE-2023-46850 OpenVPN versions between 2.6.0 and 2.6.6 incorrectly use a send buffer after it has been free()d in some circumstances, causing some free()d memory to be sent to the peer. All configurations using TLS (e.g. not using --secret) are affected by this issue. (found while tracking down CVE-2023-46849 / Github #400, #417)
- CVE-2023-46849 OpenVPN versions between 2.6.0 and 2.6.6 incorrectly restore
--fragmentconfiguration in some circumstances, leading to a division by zero when--fragmentis used. On platforms where division by zero is fatal, this will cause an OpenVPN crash. (Github #400, #417)
User visible changes:
- DCO: warn if DATA_V1 packets are sent by the other side - this a hard incompatibility between a 2.6.x client connecting to a 2.4.0-2.4.4 server, and the only fix is to use
--disable-dco. - Remove OpenSSL Engine method for loading a key. This had to be removed because the original author did not agree to relicensing the code with the new linking exception added. This was a somewhat obsolete feature anyway as it only worked with OpenSSL 1.x, which is end-of-support.
- add warning if p2p NCP client connects to a p2mp server - this is a combination that used to work without cipher negotiation (pre 2.6 on both ends), but would fail in non-obvious ways with 2.6 to 2.6.
- add warning to
--show-groupsthat not all supported groups are listed (this is due the internal enumeration in OpenSSL being a bit weird, omitting X448 and X25519 curves). --dns: remove support forexclude-domainsargument (this was a new 2.6 option, with no backend support implemented yet on any platform, and it turns out that no platform supported it at all - so remove option again)- warn user if INFO control message too long, do not forward to management client (safeguard against protocol-violating server implementations)
New features:
- DCO-WIN: get and log driver version (for easier debugging).
- print "peer temporary key details" in TLS handshake
- log OpenSSL errors on failure to set certificate, for example if the algorithms used are in acceptable to OpenSSL (misleading message would be printed in cryptoapi / pkcs11 scenarios)
- add CMake build system for MinGW and MSVC builds
- remove old MSVC build system
- improve cmocka unit test building for Windows
Windows MSI changes since 2.6.6:
- Included openvpn-gui updated to 11.45.0.0
- MSIs now use OpenSSL 3.1.4
For Community-maintained packages for Linux distributions see OpenvpnSoftwareRepos
The OpenVPN community project team is proud to release OpenVPN 2.6.6. This is a small bugfix release.
For details see Changes.rst
User visible changes:
New features:
Windows MSI changes since 2.6.5:
For Community-maintained packages for Linux distributions see OpenvpnSoftwareRepos
For details see Changes.rst
User visible changes:
- OCC exit messages are now logged more visibly See GH #391.
- OpenSSL error messages are now logged with more details (for example, when loading a provider fails, which .so was tried, and why did it fail) See GH #361.
- print a more user-friendly message when tls-crypt-v2 client auth fails
- packaging now includes all documentation in the source tarball
New features:
- set WINS server via interactive service - this adds support for "dhcp-option WINS 192.0.2.1" for DCO + wintun interfaces where no DHCP server is used. See GH #373.
Windows MSI changes since 2.6.5:
- Included openvpn-gui updated to 11.44.0.0
- MSIs now use OpenSSL 3.1.2
For Community-maintained packages for Linux distributions see OpenvpnSoftwareRepos
The OpenVPN community project team is proud to release OpenVPN 2.6.5. This is a small bugfix release.
For details see Changes.rst
User visible changes:
Windows MSI changes since 2.6.4:
Debian/Ubuntu packages in OpenvpnSoftwareRepos are now available for arm64.
For details see Changes.rst
User visible changes:
- tapctl (windows): generate driver-specific names (if using tapctl to create additional tap/wintun/dco devices, and not using --name). See GH #337.
- interactive service (windows): do not force target desktop for openvpn.exe - this has no impact for normal use, but enables running of OpenVPN in a scripted way when no user is logged on (for example, via task scheduler). See GH openvpn-gui#626
Windows MSI changes since 2.6.4:
- MSIs now use OpenSSL 3.1.1
Debian/Ubuntu packages in OpenvpnSoftwareRepos are now available for arm64.
The OpenVPN community project team is proud to release OpenVPN 2.6.4. This is a small bugfix release.
For details see Changes.rst
Note:
Feature changes:
Windows MSI changes since 2.6.3:
For details see Changes.rst
Note:
- License amendment: all new commits fall under a modified license that explicitly permits linking with Apache2 libraries (mbedTLS, OpenSSL) - see COPYING for details. Existing code will fall under the new license as soon as all contributors have agreed to the change - work ongoing.
Feature changes:
- DCO: support kernel-triggered key rotation (avoid IV reuse after 2^32 packets). This is the userland side, accepting a message from kernel, and initiating a TLS renegotiation. As of 2.6.4 release, only implemented in FreeBSD kernel.
Windows MSI changes since 2.6.3:
- Rebuilt included tap-windows driver with the correct version of the old Windows 7 driver, removing a warning about unsigned driver on Windows 7 installation. See GH openvpn-build#365.
The OpenVPN community project team is proud to release OpenVPN 2.6.3. This is a small bugfix release.
For details see Changes.rst
Feature changes:
Windows MSI changes since 2.6.2:
Note: Windows MSI was updated to I003 on April 26th. Changes in I003:
For details see Changes.rst
Feature changes:
- Windows: support setting DNS domain in configurations without GUI and DHCP (typically wintun or windco drivers), see GH openvpn#306.
Windows MSI changes since 2.6.2:
- Several Windows-specific issues fixed:
- ensure interactive service stays enabled after silent reinstall, see GH openvpn-build#348, openvpn-build#349 and openvpn-build#351
- repair querying install path info for easyrsa-start.bat on some Windows language versions, see GH openvpn-build#352.
- MSIs are now built against OpenSSL 3.1.0.
- Update included openvpn-gui to 11.41.0.0
- This update removes the ability to change the password of a private key from the GUI. This was a niche feature which caused a direct dependency of GUI on OpenSSL. Use openssl.exe directly if you need to edit a private key.
Note: Windows MSI was updated to I003 on April 26th. Changes in I003:
- The GPG subkey for creating the .asc files for the downloads has been updated. You might need to re-download or update the GPG key if verifying the signatures.
- Fix the encoding of some documentation/sample files included in the installer. See GH openvpn-build#358
- Update include tap-windows6 driver to 9.25.0
- Fixes a problem with sending small non-IP packets (e.g. PPPoE) over the VPN connection. See GH tap-windows6#158
- Note: The new driver is only used on Windows 10 and newer. We can't rebuild drivers for Windows 7/8 since Microsoft doesn't support the signing mechanism anymore. We include the previous driver version to still allow installation on Windows 7/8.
- Update included openvpn-gui to 11.42.0.0
- Fixes a problem with passphrase prompt was sometimes not displayed. See GH openvpn-gui#619
- Adds "Password Reveal" feature which allows you to see passwords while entering them.
The OpenVPN community project team is proud to release OpenVPN 2.6.2. This is mostly a bugfix release with some improvements.
For details see Changes.rst
Feature changes:
Important note for Linux DCO users:
Windows MSI changes since 2.6.1:
For details see Changes.rst
Feature changes:
- implement byte counter statistics for DCO Linux (p2mp server and client)
- implement byte counter statistics for DCO Windows (client only)
--dns server <n> address ...now permits up to 8 v4 or v6 addresses
Important note for Linux DCO users:
- New control packets flow for data channel offloading on Linux: 2.6.2+ changes the way OpenVPN control packets are handled on Linux when DCO is active, fixing the lockups observed with 2.6.0/2.6.1 under high client connect/disconnect activity. This is an INCOMPATIBLE change and therefore an ovpn-dco kernel module older than v0.2.20230323 (commit ID 726fdfe0fa21) will not work anymore and must be upgraded. The kernel module was renamed to "ovpn-dco-v2.ko" in order to highlight this change and ensure that users and userspace software could easily understand which version is loaded. Attempting to use the old ovpn-dco with 2.6.2+ will lead to disabling DCO at runtime.
Windows MSI changes since 2.6.1:
- Update included openvpn-gui to 11.39.0.0
The OpenVPN community project team is proud to release OpenVPN 2.6.1. This is mostly a bugfix release with some improvements.
For details see Changes.rst
Feature changes:
Note: configure now enables DCO build by default on FreeBSD and Linux. On Linux this brings in a new default dependency for libnl-genl (for Linux distributions that are too old to have a suitable version of the library, use configure --disable-dco)
Windows MSI changes since 2.6.1:
For details see Changes.rst
Feature changes:
- Dynamic TLS Crypt: When both peers are OpenVPN 2.6.1+, OpenVPN will dynamically create a tls-crypt key that is used for renegotiation. This ensure that only the previously authenticated peer can do trigger renegotiation and complete renegotiations.
- CryptoAPI (Windows): support issuer name as a selector. Certificate selection string can now specify a partial issuer name string as
--cryptoapicert ISSUER:<string> where <string> is matched as a substring of the issuer (CA) name in the certificate.
Note: configure now enables DCO build by default on FreeBSD and Linux. On Linux this brings in a new default dependency for libnl-genl (for Linux distributions that are too old to have a suitable version of the library, use configure --disable-dco)
Windows MSI changes since 2.6.1:
- Update included ovpn-dco-win driver to 0.9.2
The OpenVPN community project team is proud to release OpenVPN 2.6.0. This is a new stable release with some major new features.
For details see: Changes.rst
The Changes document also contains a section with workarounds for common problems encountered when using OpenVPN with OpenSSL 3.
New features and improvements in 2.6.0 compared to 2.5.8:
For details see: Changes.rst
The Changes document also contains a section with workarounds for common problems encountered when using OpenVPN with OpenSSL 3.
New features and improvements in 2.6.0 compared to 2.5.8:
- Data Channel Offload (DCO) kernel acceleration support for Windows, Linux, and FreeBSD.
- OpenSSL 3 support.
- Improved handling of tunnel MTU, including support for pushable MTU.
- Outdated cryptographic algorithms disabled by default, but there are options to override if necessary.
- Reworked TLS handshake, making OpenVPN immune to replay-packet state exhaustion attacks.
- Added --peer-fingerprint mode for a more simplistic certificate setup and verification.
- Added Pre-Logon Access Provider support to OpenVPN GUI for Windows.
- Improved protocol negotiation, leading to faster connection setup.
- Included openvpn-gui updated to 11.37.0.0. See CHANGES.rst
- Updated easy-rsa3 bundled with the installer on Windows.
- Various bug fixes.
The OpenVPN community project team is proud to release OpenVPN 2.5.10. This is a bugfix release containing several security fixes specific to the Windows platform.
For details see Changes.rst
Note that OpenVPN 2.5.x is in "Old Stable Support" status (see SupportedVersions). This usually means that we do not provide updated Windows Installers anymore, even for security fixes. Since this release fixes several issues specific to the Windows platform we decided to provide installers anyway. This does not change the support status of 2.5.x branch. We might not provide security updates for issues found in the future. We recommend that everyone switch to the 2.6.x versions of installers as soon as possible.
Security fixes:
Windows MSI changes since 2.5.10:
For details see Changes.rst
Note that OpenVPN 2.5.x is in "Old Stable Support" status (see SupportedVersions). This usually means that we do not provide updated Windows Installers anymore, even for security fixes. Since this release fixes several issues specific to the Windows platform we decided to provide installers anyway. This does not change the support status of 2.5.x branch. We might not provide security updates for issues found in the future. We recommend that everyone switch to the 2.6.x versions of installers as soon as possible.
Security fixes:
- CVE-2024-27459: Windows: fix a possible stack overflow in the interactive service component which might lead to a local privilege escalation. Reported-by: Vladimir Tokarev <vtokarev@microsoft.com>
- CVE-2024-24974: Windows: disallow access to the interactive service pipe from remote computers. Reported-by: Vladimir Tokarev <vtokarev@microsoft.com>
- CVE-2024-27903: Windows: disallow loading of plugins from untrusted installation paths, which could be used to attack
openvpn.exevia a malicious plugin. Plugins can now only be loaded from the OpenVPN install directory, the Windows system directory, and possibly from a directory specified byHKLM\SOFTWARE\OpenVPN\plugin_dir. Reported-by: Vladimir Tokarev <vtokarev@microsoft.com> - CVE-2024-1305: Windows TAP driver: Fix potential integer overflow in TapSharedSendPacket. Reported-by: Vladimir Tokarev <vtokarev@microsoft.com>
Windows MSI changes since 2.5.10:
- For the Windows-specific security fixes see above
- Built against OpenSSL 1.1.1w
- Note that OpenSSL 1.1.1 is not supported anymore, so this might not address all known issues in OpenSSL 1.1.1. If that concerns you, please switch to OpenVPN 2.6.x
- Included tap6-windows driver updated to 9.27.0
- Security fix, see above
The OpenVPN community project team is proud to release OpenVPN 2.5.9. This is a small bugfix release.
For details see Changes.rst
For details see Changes.rst
The OpenVPN community project team is proud to release OpenVPN 2.5.8. This is mostly a bugfix release.
For details see Changes.rst
However, there were several enhancements of the Windows GUI component:
For details see Changes.rst
However, there were several enhancements of the Windows GUI component:
- OpenVPN 3 support — the GUI can also work as a user interface for the OpenVPN 3 client.
- pkcs11-id-management — the GUI can list available pkcs11-ids and allows the user to select one.
- Persistent connections — the GUI lists connections started at boot by the automatic service and lets the user control them. Interactive inputs such as username/password with such connections are possible.
The OpenVPN community project team is proud to release OpenVPN 2.5.7. This is mostly a bugfix release, but adds limited support for OpenSSL 3.0. Full support will arrive in OpenVPN 2.6.
The OpenVPN community project team is proud to release OpenVPN 2.5.6. This is mostly a bugfix release including one security fix ("Disallow multiple deferred authentication plug-ins.", CVE: 2022-0547). The I605 installers include OpenVPN GUI with a bug fix, as well as updated OpenSSL (1.1.1o).
The OpenVPN community project team is proud to release OpenVPN 2.5.5. The most notable changes are Windows-related: use of CFG Spectre-mitigations in MSVC builds, bringing back of OpenSSL config loading and several build fixes. More details are available in Changes.rst.
The OpenVPN community project team is proud to release OpenVPN 2.5.4. This release include a number of fixes and small improvements. One of the fixes is to password prompting on windows console when stderr redirection is in use - this breaks 2.5.x on Win11/ARM, and might also break on Win11/amd64. Windows executable and libraries are now built natively on Windows using MSVC, not cross-compiled on Linux as with earlier 2.5 releases. Windows installers include updated OpenSSL and new OpenVPN GUI. The latter includes several improvements, the most important of which is the ability to import profiles from URLs where available. Installer version I602 fixes loading of pkcs11 files on Windows. Installer version I603 fixes a bug in the version number as seen by Windows (was 2.5..4, not 2.5.4). Installer I604 fixes some small Windows issues.
Overview of changes since OpenVPN 2.4
Faster connections
- Connections setup is now much faster
Crypto specific changes
- ChaCha20-Poly1305 cipher in the OpenVPN data channel (Requires OpenSSL 1.1.0 or newer)
- Improved TLS 1.3 support when using OpenSSL 1.1.1 or newer
- Client-specific tls-crypt keys (--tls-crypt-v2)
- Improved Data channel cipher negotiation
- Removal of BF-CBC support in default configuration (see below for possible incompatibilities)
Server-side improvements
- HMAC based auth-token support for seamless reconnects to standalone servers or a group of servers.
- Asynchronous (deferred) authentication support for auth-pam plugin
- Asynchronous (deferred) support for client-connect scripts and plugins
Network-related changes
- Support IPv4 configs with /31 netmasks now
- 802.1q VLAN support on TAP servers
- IPv6-only tunnels
- New option --block-ipv6 to reject all IPv6 packets (ICMPv6)
Linux-specific features
- VRF support
- Netlink integration (OpenVPN no longer needs to execute ifconfig/route or ip commands)
Windows-specific features
- Wintun driver support, a faster alternative to tap-windows6
- Setting tun/tap interface MTU
- Setting DHCP search domain
- Allow unicode search string in --cryptoapicert option
- EasyRSA3, a modern take on OpenVPN CA management
- MSI installer
Important notices
BF-CBC cipher is no longer the default
Cipher handling for the data channel cipher has been significantly changed between OpenVPN 2.3/2.4 and v2.5, most notably there are no "default cipher BF-CBC" anymore because it is no longer considered a reasonable default. BF-CBC is still available, but it needs to be explicitly configured now.
For connections between OpenVPN 2.4 and v2.5 clients and servers, both ends will be able to negotiate a better cipher than BF-CBC. By default they will select one of the AES-GCM ciphers, but this can be influenced using the --data-ciphers setting.
Connections between OpenVPN 2.3 and v2.5 that have no --cipher setting in the config (= defaulting to BF-CBC and not being negotiation-capable) must be updated. Unless BF-CBC is included in --data-ciphers or there is a "--cipher BF-CBC" in the OpenVPN 2.5 config, a v2.5 client or server will refuse to talk to a v2.3 server or client, because it has no common data channel cipher and negotiating a cipher is not possible. Generally, we recommend upgrading such setups to OpenVPN 2.4 or v2.5. If upgrading is not possible we recommend adding data-ciphers AES-256-GCM:AES-128-GCM:AES-128-CBC (for v2.5+) or cipher AES-128-CBC (v2.4.x and older) to the configuration of all clients and servers.
If you really need to use an unsupported OpenVPN 2.3 (or even older) release and need to stay on BF-CBC (not recommended), the OpenVPN 2.5 based client will need a config file change to re-enable BF-CBC. But be warned that BF-CBC and other related weak ciphers will be removed in coming OpenVPN major releases.
For full details see the "Data channel cipher negotiation" section on the man page.
Connectivity to some VPN service provider may break
Connecting with an OpenVPN 2.5 client to at least one commercial VPN service that implemented their own cipher negotiation method that always reports back that it is using BF-CBC to the client is broken in v2.5. This has always caused warning about mismatch ciphers. We have been in contact with some service providers and they are looking into it. This is not something the OpenVPN community can fix. If your commercial VPN does not work with a v2.5 client, complain to the VPN service provider.
More details on these new features as well as a list of deprecated features and user-visible changes are available in Changes.rst.
Linux packages are available from
- Official Debian and Ubuntu apt repositories
- Red Hat/Fedora dnf/yum repositories (provided by Fedora Copr)
Useful resources
- Official documentation
- Wiki
- Bug tracker
- Support forums
- User mailing list
- User IRC channel (#openvpn at irc.libera.chat)
The OpenVPN community project team is proud to release OpenVPN 2.5.3. Besides a number of small improvements and bug fixes, this release fixes a possible security issue with OpenSSL config autoloading on Windows (CVE-2021-3606). Updated OpenVPN GUI is also included in Windows installers.
Overview of changes since OpenVPN 2.4
Faster connections
- Connections setup is now much faster
Crypto specific changes
- ChaCha20-Poly1305 cipher in the OpenVPN data channel (Requires OpenSSL 1.1.0 or newer)
- Improved TLS 1.3 support when using OpenSSL 1.1.1 or newer
- Client-specific tls-crypt keys (--tls-crypt-v2)
- Improved Data channel cipher negotiation
- Removal of BF-CBC support in default configuration (see below for possible incompatibilities)
Server-side improvements
- HMAC based auth-token support for seamless reconnects to standalone servers or a group of servers.
- Asynchronous (deferred) authentication support for auth-pam plugin
- Asynchronous (deferred) support for client-connect scripts and plugins
Network-related changes
- Support IPv4 configs with /31 netmasks now
- 802.1q VLAN support on TAP servers
- IPv6-only tunnels
- New option --block-ipv6 to reject all IPv6 packets (ICMPv6)
Linux-specific features
- VRF support
- Netlink integration (OpenVPN no longer needs to execute ifconfig/route or ip commands)
Windows-specific features
- Wintun driver support, a faster alternative to tap-windows6
- Setting tun/tap interface MTU
- Setting DHCP search domain
- Allow unicode search string in --cryptoapicert option
- EasyRSA3, a modern take on OpenVPN CA management
- MSI installer
Important notices
BF-CBC cipher is no longer the default
Cipher handling for the data channel cipher has been significantly changed between OpenVPN 2.3/2.4 and v2.5, most notably there are no "default cipher BF-CBC" anymore because it is no longer considered a reasonable default. BF-CBC is still available, but it needs to be explicitly configured now.
For connections between OpenVPN 2.4 and v2.5 clients and servers, both ends will be able to negotiate a better cipher than BF-CBC. By default they will select one of the AES-GCM ciphers, but this can be influenced using the --data-ciphers setting.
Connections between OpenVPN 2.3 and v2.5 that have no --cipher setting in the config (= defaulting to BF-CBC and not being negotiation-capable) must be updated. Unless BF-CBC is included in --data-ciphers or there is a "--cipher BF-CBC" in the OpenVPN 2.5 config, a v2.5 client or server will refuse to talk to a v2.3 server or client, because it has no common data channel cipher and negotiating a cipher is not possible. Generally, we recommend upgrading such setups to OpenVPN 2.4 or v2.5. If upgrading is not possible we recommend adding data-ciphers AES-256-GCM:AES-128-GCM:AES-128-CBC (for v2.5+) or cipher AES-128-CBC (v2.4.x and older) to the configuration of all clients and servers.
If you really need to use an unsupported OpenVPN 2.3 (or even older) release and need to stay on BF-CBC (not recommended), the OpenVPN 2.5 based client will need a config file change to re-enable BF-CBC. But be warned that BF-CBC and other related weak ciphers will be removed in coming OpenVPN major releases.
For full details see the "Data channel cipher negotiation" section on the man page.
Connectivity to some VPN service provider may break
Connecting with an OpenVPN 2.5 client to at least one commercial VPN service that implemented their own cipher negotiation method that always reports back that it is using BF-CBC to the client is broken in v2.5. This has always caused warning about mismatch ciphers. We have been in contact with some service providers and they are looking into it. This is not something the OpenVPN community can fix. If your commercial VPN does not work with a v2.5 client, complain to the VPN service provider.
More details on these new features as well as a list of deprecated features and user-visible changes are available in Changes.rst.
Linux packages are available from
- Official Debian and Ubuntu apt repositories
- Red Hat/Fedora dnf/yum repositories (provided by Fedora Copr)
Useful resources
- Official documentation
- Wiki
- Bug tracker
- Support forums
- User mailing list
- User IRC channel (#openvpn at irc.libera.chat)
The OpenVPN community project team is proud to release OpenVPN 2.5.2. It fixes two related security vulnerabilities (CVE-2020-15078) which under very specific circumstances allow tricking a server using delayed authentication (plugin or management) into returning a PUSH_REPLY before the AUTH_FAILED message, which can possibly be used to gather information about a VPN setup. In combination with 'auth-gen-token' or a user-specific token auth solution it can be possible to get access to a VPN with an otherwise-invalid account. OpenVPN 2.5.2 also includes other bug fixes and improvements. Updated OpenSSL and OpenVPN GUI are included in Windows installers.
Overview of changes since OpenVPN 2.4
Faster connections
- Connections setup is now much faster
Crypto specific changes
- ChaCha20-Poly1305 cipher in the OpenVPN data channel (Requires OpenSSL 1.1.0 or newer)
- Improved TLS 1.3 support when using OpenSSL 1.1.1 or newer
- Client-specific tls-crypt keys (--tls-crypt-v2)
- Improved Data channel cipher negotiation
- Removal of BF-CBC support in default configuration (see below for possible incompatibilities)
Server-side improvements
- HMAC based auth-token support for seamless reconnects to standalone servers or a group of servers
- Asynchronous (deferred) authentication support for auth-pam plugin
- Asynchronous (deferred) support for client-connect scripts and plugins
Network-related changes
- Support IPv4 configs with /31 netmasks now
- 802.1q VLAN support on TAP servers
- IPv6-only tunnels
- New option --block-ipv6 to reject all IPv6 packets
Linux-specific features
- VRF support
- Netlink integration (OpenVPN no longer needs to execute ifconfig/route or ip commands)
Windows-specific features
- Wintun driver support, a faster alternative to tap-windows6
- Setting tun/tap interface MTU
- Setting DHCP search domain
- Allow unicode search string in --cryptoapicert option
- EasyRSA3, a modern take on OpenVPN CA management
- MSI installer
Important notices
BF-CBC cipher is no longer the default
Cipher handling for the data channel cipher has been significantly changed between OpenVPN 2.3/2.4 and v2.5, most notably there are no "default cipher BF-CBC" anymore because it is no longer considered a reasonable default. BF-CBC is still available, but it needs to be explicitly configured now.For connections between OpenVPN 2.4 and v2.5 clients and servers, both ends will be able to negotiate a better cipher than BF-CBC. By default they will select one of the AES-GCM ciphers, but this can be influenced using the --data-ciphers setting.
For full details see the "Data channel cipher negotiation" section on the man page.
Useful resources
- Official documentation
- Wiki
- Bug tracker
- Support forums
- User IRC channel (#openvpn at irc.libera.chat)
The OpenVPN community project team is proud to release OpenVPN 2.5.1. It includes several bug fixes and improvements as well as updated OpenSSL and OpenVPN GUI for Windows.
Important notices
BF-CBC cipher is no longer the default
Cipher handling for the data channel cipher has been significantly changed between OpenVPN 2.3/2.4 and v2.5, most notably there are no "default cipher BF-CBC" anymore because it is no longer considered a reasonable default. BF-CBC is still available, but it needs to be explicitly configured now.For connections between OpenVPN 2.4 and v2.5 clients and servers, both ends will be able to negotiate a better cipher than BF-CBC. By default they will select one of the AES-GCM ciphers, but this can be influenced using the --data-ciphers setting.
Connections between OpenVPN 2.3 and v2.5 that have no --cipher setting in the config (= defaulting to BF-CBC and not being negotiation-capable) must be updated. Unless BF-CBC is included in --data-ciphers or there is a "--cipher BF-CBC" in the OpenVPN 2.5 config, a v2.5 client or server will refuse to talk to a v2.3 server or client, because it has no common data channel cipher and negotiating a cipher is not possible.
If you really need to use an unsupported OpenVPN 2.3 (or even older) release and need to stay on BF-CBC (not recommended), the OpenVPN 2.5 based client will need a config file change to re-enable BF-CBC. But be warned that BF-CBC and other related weak ciphers will be removed in coming OpenVPN major releases.
For full details see the "Data channel cipher negotiation" section on the man page.
Connectivity to some VPN service provider may break
Connecting with an OpenVPN 2.5 client to at least one commercial VPN service that implemented their own cipher negotiation method that always reports back that it is using BF-CBC to the client is broken in v2.5. This has always caused warning about mismatch ciphers. We have been in contact with some service providers and they are looking into it. This is not something the OpenVPN community can fix. If your commercial VPN does not work with a v2.5 client, complain to the VPN service provider.Useful resources
- Official documentation
- Wiki
- Bug tracker
- Support forums
- User mailing list
- User IRC channel (#openvpn at irc.libera.chat)
The OpenVPN community project team is proud to release OpenVPN 2.5.0 which is a new major release with many new features.
Overview of changes since OpenVPN 2.4
Faster connections
- Connections setup is now much faster
Crypto specific changes
- ChaCha20-Poly1305 cipher in the OpenVPN data channel (Requires OpenSSL 1.1.0 or newer)
- Improved TLS 1.3 support when using OpenSSL 1.1.1 or newer
- Client-specific tls-crypt keys (--tls-crypt-v2)
- Improved Data channel cipher negotiation
- Removal of BF-CBC support in default configuration (see below for possible incompatibilities)
Server-side improvements
- HMAC based auth-token support for seamless reconnects to standalone servers or a group of servers
- Asynchronous (deferred) authentication support for auth-pam plugin
- Asynchronous (deferred) support for client-connect scripts and plugins
Network-related changes
- Support IPv4 configs with /31 netmasks now
- 802.1q VLAN support on TAP servers
- IPv6-only tunnels
- New option --block-ipv6 to reject all IPv6 packets (ICMPv6)
Linux-specific features
- VRF support
- Netlink integration (OpenVPN no longer needs to execute ifconfig/route or ip commands)
Windows-specific features
- Wintun driver support, a faster alternative to tap-windows6
- Setting tun/tap interface MTU
- Setting DHCP search domain
- Allow unicode search string in --cryptoapicert option
- EasyRSA3, a modern take on OpenVPN CA management
- MSI installer
Linux packages are available from
- Official Debian and Ubuntu apt repositories
- Red Hat/Fedora dnf/yum repositories (provided by Fedora Copr)
Useful resources
- Official documentation
- Wiki
- Bug tracker
- Support forums
- User mailing list
- User IRC channel (#openvpn at irc.libera.chat)
The OpenVPN community project team is proud to release OpenVPN 2.4.12, the final release in the 2.4.x series. This is mostly a bugfix release including one security fix ("Disallow multiple deferred authentication plug-ins.", CVE: 2022-0547).
Windows 10/Server 2016/Server 2019 installer (NSIS)
The OpenVPN community project team is proud to release OpenVPN 2.4.11. It fixes two related security vulnerabilities (CVE-2020-15078) which under very specific circumstances allow tricking a server using delayed authentication (plugin or management) into returning a PUSH_REPLY before the AUTH_FAILED message, which can possibly be used to gather information about a VPN setup. This release also includes other bug fixes and improvements. The I602 Windows installers fix a possible security issue with OpenSSL config autoloading on Windows (CVE-2021-3606). Updated OpenSSL and OpenVPN GUI are included in Windows installers.
Windows 10/Server 2016/Server 2019 installer (NSIS)
A summary of the changes is available in Changes.rst, and a full list of changes is available here.
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them.
Please note that OpenVPN 2.4 installers will not work on Windows XP. The last OpenVPN version that supports Windows XP is 2.3.18, which is downloadable as 32-bit and 64-bit versions.
If you find a bug in this release, please file a bug report to our Trac bug tracker. In uncertain cases please contact our developers first, either using the openvpn-devel mailinglist or the developer IRC channel (#openvpn-devel at irc.libera.chat). For generic help take a look at our official documentation, wiki, forums, openvpn-users mailing list and user IRC channel (#openvpn at irc.libera.chat).
Important: you will need to use the correct installer for your operating system. The Windows 10 installer works on Windows 10 and Windows Server 2016/2019. The Windows 7 installer will work on Windows 7/8/8.1/Server 2012r2. This is because of Microsoft's driver signing requirements are different for kernel-mode devices drivers, which in our case affects OpenVPN's tap driver (tap-windows6).
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them.
Please note that OpenVPN 2.4 installers will not work on Windows XP. The last OpenVPN version that supports Windows XP is 2.3.18, which is downloadable as 32-bit and 64-bit versions.
If you find a bug in this release, please file a bug report to our Trac bug tracker. In uncertain cases please contact our developers first, either using the openvpn-devel mailinglist or the developer IRC channel (#openvpn-devel at irc.libera.chat). For generic help take a look at our official documentation, wiki, forums, openvpn-users mailing list and user IRC channel (#openvpn at irc.libera.chat).
Important: you will need to use the correct installer for your operating system. The Windows 10 installer works on Windows 10 and Windows Server 2016/2019. The Windows 7 installer will work on Windows 7/8/8.1/Server 2012r2. This is because of Microsoft's driver signing requirements are different for kernel-mode devices drivers, which in our case affects OpenVPN's tap driver (tap-windows6).
This is primarily a maintenance release with bugfixes and small improvements. Windows installers include the latest OpenSSL version (1.1.1i) which includes security fixes.
A summary of the changes is available in Changes.rst, and a full list of changes is available here.
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them.
Please note that OpenVPN 2.4 installers will not work on Windows XP. The last OpenVPN version that supports Windows XP is 2.3.18, which is downloadable as 32-bit and 64-bit versions.
Important: you will need to use the correct installer for your operating system. The Windows 10 installer works on Windows 10 and Windows Server 2016/2019. The Windows 7 installer will work on Windows 7/8/8.1/Server 2012r2. This is because of Microsoft's driver signing requirements are different for kernel-mode devices drivers, which in our case affects OpenVPN's tap driver (tap-windows6).
A summary of the changes is available in Changes.rst, and a full list of changes is available here.
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them.
Please note that OpenVPN 2.4 installers will not work on Windows XP. The last OpenVPN version that supports Windows XP is 2.3.18, which is downloadable as 32-bit and 64-bit versions.
Important: you will need to use the correct installer for your operating system. The Windows 10 installer works on Windows 10 and Windows Server 2016/2019. The Windows 7 installer will work on Windows 7/8/8.1/Server 2012r2. This is because of Microsoft's driver signing requirements are different for kernel-mode devices drivers, which in our case affects OpenVPN's tap driver (tap-windows6).
Windows 10/Server 2016/Server 2019 installer (NSIS)
Instructions for verifying the signatures are available here.
This release is also available in our own software repositories for Debian and Ubuntu, Supported architectures are i386 and amd64. For details, look here.
The Windows installers are bundled with OpenVPN-GUI - its source code is available on its project page and as tarballs on our alternative download server.
This release is also available in our own software repositories for Debian and Ubuntu, Supported architectures are i386 and amd64. For details, look here.
The Windows installers are bundled with OpenVPN-GUI - its source code is available on its project page and as tarballs on our alternative download server.
This is primarily a maintenance release with bugfixes and improvements. This release also fixes a security issue (CVE-2020-11810, trac #1272) which allows disrupting service of a freshly connected client that has not yet not negotiated session keys. The vulnerability cannot be used to inject or steal VPN traffic.
A summary of the changes is available in Changes.rst, and a full list of changes is available here.
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them. We are moving to MSI installers in OpenVPN 2.5, but OpenVPN 2.4.x will remain NSIS-only.
Compared to OpenVPN 2.3 this is a major update with a large number of new features, improvements and fixes. Some of the major features are AEAD (GCM) cipher and Elliptic Curve DH key exchange support, improved IPv4/IPv6 dual stack support and more seamless connection migration when client's IP address changes (Peer-ID). Also, the new --tls-crypt feature can be used to increase users' connection privacy.
OpenVPN GUI bundled with the Windows installer has a large number of new features compared to the one bundled with OpenVPN 2.3. One of major features is the ability to run OpenVPN GUI without administrator privileges. For full details, see the changelog. The new OpenVPN GUI features are documented here.
Please note that OpenVPN 2.4 installers will not work on Windows XP. The last OpenVPN version that supports Windows XP is 2.3.18, which is downloadable as 32-bit and 64-bit versions.
If you find a bug in this release, please file a bug report to our Trac bug tracker. In uncertain cases please contact our developers first, either using the openvpn-devel mailinglist or the developer IRC channel (#openvpn-devel at irc.libera.chat). For generic help take a look at our official documentation, wiki, forums, openvpn-users mailing list and user IRC channel (#openvpn at irc.libera.chat).
Important: you will need to use the correct installer for your operating system. The Windows 10 installer works on Windows 10 and Windows Server 2016/2019. The Windows 7 installer will work on Windows 7/8/8.1/Server 2012r2. This is because of Microsoft's driver signing requirements are different for kernel-mode devices drivers, which in our case affects OpenVPN's tap driver (tap-windows6).
A summary of the changes is available in Changes.rst, and a full list of changes is available here.
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them. We are moving to MSI installers in OpenVPN 2.5, but OpenVPN 2.4.x will remain NSIS-only.
Compared to OpenVPN 2.3 this is a major update with a large number of new features, improvements and fixes. Some of the major features are AEAD (GCM) cipher and Elliptic Curve DH key exchange support, improved IPv4/IPv6 dual stack support and more seamless connection migration when client's IP address changes (Peer-ID). Also, the new --tls-crypt feature can be used to increase users' connection privacy.
OpenVPN GUI bundled with the Windows installer has a large number of new features compared to the one bundled with OpenVPN 2.3. One of major features is the ability to run OpenVPN GUI without administrator privileges. For full details, see the changelog. The new OpenVPN GUI features are documented here.
Please note that OpenVPN 2.4 installers will not work on Windows XP. The last OpenVPN version that supports Windows XP is 2.3.18, which is downloadable as 32-bit and 64-bit versions.
If you find a bug in this release, please file a bug report to our Trac bug tracker. In uncertain cases please contact our developers first, either using the openvpn-devel mailinglist or the developer IRC channel (#openvpn-devel at irc.libera.chat). For generic help take a look at our official documentation, wiki, forums, openvpn-users mailing list and user IRC channel (#openvpn at irc.libera.chat).
Important: you will need to use the correct installer for your operating system. The Windows 10 installer works on Windows 10 and Windows Server 2016/2019. The Windows 7 installer will work on Windows 7/8/8.1/Server 2012r2. This is because of Microsoft's driver signing requirements are different for kernel-mode devices drivers, which in our case affects OpenVPN's tap driver (tap-windows6).
Windows 10/Server 2016/Server 2019 installer (NSIS)
NOTE: the GPG key used to sign the release files has been changed since OpenVPN 2.4.0. Instructions for verifying the signatures, as well as the new GPG public key are available here.
We also provide static URLs pointing to latest releases to ease automation. For a list of files look here.
This release is also available in our own software repositories for Debian and Ubuntu, Supported architectures are i386 and amd64. For details, look here.
You can use EasyRSA 2 or EasyRSA 3 for generating your own certificate authority. The former is bundled with Windows installers. The latter is a more modern alternative for UNIX-like operating systems.
The Windows installers are bundled with OpenVPN-GUI - its source code is available on its project page and as tarballs on our alternative download server.
We also provide static URLs pointing to latest releases to ease automation. For a list of files look here.
This release is also available in our own software repositories for Debian and Ubuntu, Supported architectures are i386 and amd64. For details, look here.
You can use EasyRSA 2 or EasyRSA 3 for generating your own certificate authority. The former is bundled with Windows installers. The latter is a more modern alternative for UNIX-like operating systems.
The Windows installers are bundled with OpenVPN-GUI - its source code is available on its project page and as tarballs on our alternative download server.
This is primarily a maintenance release with bugfixes and improvements. The Windows installers (I601) have several improvements compared to the previous release:
A summary of the changes is available in Changes.rst, and a full list of changes is available here.
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them. We are moving to MSI installers in OpenVPN 2.5, but OpenVPN 2.4.x will remain NSIS-only.
Compared to OpenVPN 2.3 this is a major update with a large number of new features, improvements and fixes. Some of the major features are AEAD (GCM) cipher and Elliptic Curve DH key exchange support, improved IPv4/IPv6 dual stack support and more seamless connection migration when client's IP address changes (Peer-ID). Also, the new --tls-crypt feature can be used to increase users' connection privacy.
OpenVPN GUI bundled with the Windows installer has a large number of new features compared to the one bundled with OpenVPN 2.3. One of major features is the ability to run OpenVPN GUI without administrator privileges. For full details, see the changelog. The new OpenVPN GUI features are documented here.
Please note that OpenVPN 2.4 installers will not work on Windows XP. The last OpenVPN version that supports Windows XP is 2.3.18, which is downloadable as 32-bit and 64-bit versions.
If you find a bug in this release, please file a bug report to our Trac bug tracker. In uncertain cases please contact our developers first, either using the openvpn-devel mailinglist or the developer IRC channel (#openvpn-devel at irc.libera.chat). For generic help take a look at our official documentation, wiki, forums, openvpn-users mailing list and user IRC channel (#openvpn at irc.libera.chat).
Important: you will need to use the correct installer for your operating system. The Windows 10 installer works on Windows 10 and Windows Server 2016/2019. The Windows 7 installer will work on Windows 7/8/8.1/Server 2012r2. This is because of Microsoft's driver signing requirements are different for kernel-mode devices drivers, which in our case affects OpenVPN's tap driver (tap-windows6).
- New tap-windows6 driver (9.24.2) which fixes some suspend and resume issues
- Latest OpenVPN-GUI
- Considerable performance boost due to new compiler optimization flags
A summary of the changes is available in Changes.rst, and a full list of changes is available here.
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them. We are moving to MSI installers in OpenVPN 2.5, but OpenVPN 2.4.x will remain NSIS-only.
Compared to OpenVPN 2.3 this is a major update with a large number of new features, improvements and fixes. Some of the major features are AEAD (GCM) cipher and Elliptic Curve DH key exchange support, improved IPv4/IPv6 dual stack support and more seamless connection migration when client's IP address changes (Peer-ID). Also, the new --tls-crypt feature can be used to increase users' connection privacy.
OpenVPN GUI bundled with the Windows installer has a large number of new features compared to the one bundled with OpenVPN 2.3. One of major features is the ability to run OpenVPN GUI without administrator privileges. For full details, see the changelog. The new OpenVPN GUI features are documented here.
Please note that OpenVPN 2.4 installers will not work on Windows XP. The last OpenVPN version that supports Windows XP is 2.3.18, which is downloadable as 32-bit and 64-bit versions.
If you find a bug in this release, please file a bug report to our Trac bug tracker. In uncertain cases please contact our developers first, either using the openvpn-devel mailinglist or the developer IRC channel (#openvpn-devel at irc.libera.chat). For generic help take a look at our official documentation, wiki, forums, openvpn-users mailing list and user IRC channel (#openvpn at irc.libera.chat).
Important: you will need to use the correct installer for your operating system. The Windows 10 installer works on Windows 10 and Windows Server 2016/2019. The Windows 7 installer will work on Windows 7/8/8.1/Server 2012r2. This is because of Microsoft's driver signing requirements are different for kernel-mode devices drivers, which in our case affects OpenVPN's tap driver (tap-windows6).
Windows 10/Server 2016/Server 2019 installer (NSIS)
NOTE: the GPG key used to sign the release files has been changed since OpenVPN 2.4.0. Instructions for verifying the signatures, as well as the new GPG public key are available here.
We also provide static URLs pointing to latest releases to ease automation. For a list of files look here.
This release is also available in our own software repositories for Debian and Ubuntu, Supported architectures are i386 and amd64. For details, look here.
You can use EasyRSA 2 or EasyRSA 3 for generating your own certificate authority. The former is bundled with Windows installers. The latter is a more modern alternative for UNIX-like operating systems.
The Windows installers are bundled with OpenVPN-GUI - its source code is available on its project page and as tarballs on our alternative download server.
We also provide static URLs pointing to latest releases to ease automation. For a list of files look here.
This release is also available in our own software repositories for Debian and Ubuntu, Supported architectures are i386 and amd64. For details, look here.
You can use EasyRSA 2 or EasyRSA 3 for generating your own certificate authority. The former is bundled with Windows installers. The latter is a more modern alternative for UNIX-like operating systems.
The Windows installers are bundled with OpenVPN-GUI - its source code is available on its project page and as tarballs on our alternative download server.
This is primarily a maintenance release with bugfixes and improvements. One of the big things is enhanced TLS 1.3 support. A summary of the changes is available in Changes.rst, and a full list of changes is available here.
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them. We are moving to MSI installers in OpenVPN 2.5, but OpenVPN 2.4.x will remain NSIS-only.
Compared to OpenVPN 2.3 this is a major update with a large number of new features, improvements and fixes. Some of the major features are AEAD (GCM) cipher and Elliptic Curve DH key exchange support, improved IPv4/IPv6 dual stack support and more seamless connection migration when client's IP address changes (Peer-ID). Also, the new --tls-crypt feature can be used to increase users' connection privacy.
OpenVPN GUI bundled with the Windows installer has a large number of new features compared to the one bundled with OpenVPN 2.3. One of major features is the ability to run OpenVPN GUI without administrator privileges. For full details, see the changelog. The new OpenVPN GUI features are documented here.
Please note that OpenVPN 2.4 installers will not work on Windows XP. The last OpenVPN version that supports Windows XP is 2.3.18, which is downloadable as 32-bit and 64-bit versions.
If you find a bug in this release, please file a bug report to our Trac bug tracker. In uncertain cases please contact our developers first, either using the openvpn-devel mailinglist or the developer IRC channel (#openvpn-devel at irc.libera.chat). For generic help take a look at our official documentation, wiki, forums, openvpn-users mailing list and user IRC channel (#openvpn at irc.libera.chat).
Important: you will need to use the correct installer for your operating system. The Windows 10 installer will not work on Windows 7/8/8.1/Server 2012r2. This is because Microsoft's driver signing requirements and tap-windows6. For the same reason you need to use an older installer with Windows Server 2016. This older installer has a local privilege escalation vulnerability issue which we cannot resolve for Windows Server 2016 until tap-windows6 passes the HLK test suite on that platform. In the meanwhile we recommend Windows Server 2016 users to avoid installing OpenVPN/tap-windows6 driver on hosts where all users can't be trusted. Users of Windows 7-10 and Server 2012r2 are recommended to update to latest installers as soon as possible.
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them. We are moving to MSI installers in OpenVPN 2.5, but OpenVPN 2.4.x will remain NSIS-only.
Compared to OpenVPN 2.3 this is a major update with a large number of new features, improvements and fixes. Some of the major features are AEAD (GCM) cipher and Elliptic Curve DH key exchange support, improved IPv4/IPv6 dual stack support and more seamless connection migration when client's IP address changes (Peer-ID). Also, the new --tls-crypt feature can be used to increase users' connection privacy.
OpenVPN GUI bundled with the Windows installer has a large number of new features compared to the one bundled with OpenVPN 2.3. One of major features is the ability to run OpenVPN GUI without administrator privileges. For full details, see the changelog. The new OpenVPN GUI features are documented here.
Please note that OpenVPN 2.4 installers will not work on Windows XP. The last OpenVPN version that supports Windows XP is 2.3.18, which is downloadable as 32-bit and 64-bit versions.
If you find a bug in this release, please file a bug report to our Trac bug tracker. In uncertain cases please contact our developers first, either using the openvpn-devel mailinglist or the developer IRC channel (#openvpn-devel at irc.libera.chat). For generic help take a look at our official documentation, wiki, forums, openvpn-users mailing list and user IRC channel (#openvpn at irc.libera.chat).
Important: you will need to use the correct installer for your operating system. The Windows 10 installer will not work on Windows 7/8/8.1/Server 2012r2. This is because Microsoft's driver signing requirements and tap-windows6. For the same reason you need to use an older installer with Windows Server 2016. This older installer has a local privilege escalation vulnerability issue which we cannot resolve for Windows Server 2016 until tap-windows6 passes the HLK test suite on that platform. In the meanwhile we recommend Windows Server 2016 users to avoid installing OpenVPN/tap-windows6 driver on hosts where all users can't be trusted. Users of Windows 7-10 and Server 2012r2 are recommended to update to latest installers as soon as possible.
NOTE: the GPG key used to sign the release files has been changed since OpenVPN 2.4.0. Instructions for verifying the signatures, as well as the new GPG public key are available here.
We also provide static URLs pointing to latest releases to ease automation. For a list of files look here.
This release is also available in our own software repositories for Debian and Ubuntu, Supported architectures are i386 and amd64. For details, look here.
You can use EasyRSA 2 or EasyRSA 3 for generating your own certificate authority. The former is bundled with Windows installers. The latter is a more modern alternative for UNIX-like operating systems.
The Windows installers are bundled with OpenVPN-GUI - its source code is available on its project page and as tarballs on our alternative download server.
We also provide static URLs pointing to latest releases to ease automation. For a list of files look here.
This release is also available in our own software repositories for Debian and Ubuntu, Supported architectures are i386 and amd64. For details, look here.
You can use EasyRSA 2 or EasyRSA 3 for generating your own certificate authority. The former is bundled with Windows installers. The latter is a more modern alternative for UNIX-like operating systems.
The Windows installers are bundled with OpenVPN-GUI - its source code is available on its project page and as tarballs on our alternative download server.
This is primarily a maintenance release with minor bugfixes and improvements, and one security relevant fix for the Windows Interactive Service. Windows installer includes updated OpenVPN GUI and OpenSSL. Installer I601 included tap-windows6 driver 9.22.1 which had one security fix and dropped Windows Vista support. However, in installer I602 we had to revert back to tap-windows 9.21.2 due to driver getting reject on freshly installed Windows 10 rev 1607 and later when Secure Boot was enabled. The failure was due to the new, more strict driver signing requirements. The 9.22.1 version of the driver is in the process of getting approved and signed by Microsoft and will be bundled in an upcoming Windows installer.
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them. Our long-term plan is to migrate to using MSI installers instead.
Compared to OpenVPN 2.3 this is a major update with a large number of new features, improvements and fixes. Some of the major features are AEAD (GCM) cipher and Elliptic Curve DH key exchange support, improved IPv4/IPv6 dual stack support and more seamless connection migration when client's IP address changes (Peer-ID). Also, the new --tls-crypt feature can be used to increase users' connection privacy.
A summary of the changes is available in Changes.rst, and a full list of changes is available here.
OpenVPN GUI bundled with the Windows installer has a large number of new features compared to the one bundled with OpenVPN 2.3. One of major features is the ability to run OpenVPN GUI without administrator privileges. For full details, see the changelog. The new OpenVPN GUI features are documented here.
Please note that OpenVPN 2.4 installers will not work on Windows XP.
If you find a bug in this release, please file a bug report to our Trac bug tracker. In uncertain cases please contact our developers first, either using the openvpn-devel mailinglist or the developer IRC channel (#openvpn-devel at irc.libera.chat). For generic help take a look at our official documentation, wiki, forums, openvpn-users mailing list and user IRC channel (#openvpn at irc.libera.chat).
Please note that LibreSSL is not a supported crypto backend. We accept patches and we do test on OpenBSD 6.0 which comes with LibreSSL, but if newer versions of LibreSSL break API compatibility we do not take responsibility to fix that.
Also note that Windows installers have been built with NSIS version that has been patched against several NSIS installer code execution and privilege escalation problems. Based on our testing, though, older Windows versions such as Windows 7 might not benefit from these fixes. We thus strongly encourage you to always move NSIS installers to a non-user-writeable location before running them. Our long-term plan is to migrate to using MSI installers instead.
Compared to OpenVPN 2.3 this is a major update with a large number of new features, improvements and fixes. Some of the major features are AEAD (GCM) cipher and Elliptic Curve DH key exchange support, improved IPv4/IPv6 dual stack support and more seamless connection migration when client's IP address changes (Peer-ID). Also, the new --tls-crypt feature can be used to increase users' connection privacy.
A summary of the changes is available in Changes.rst, and a full list of changes is available here.
OpenVPN GUI bundled with the Windows installer has a large number of new features compared to the one bundled with OpenVPN 2.3. One of major features is the ability to run OpenVPN GUI without administrator privileges. For full details, see the changelog. The new OpenVPN GUI features are documented here.
Please note that OpenVPN 2.4 installers will not work on Windows XP.
If you find a bug in this release, please file a bug report to our Trac bug tracker. In uncertain cases please contact our developers first, either using the openvpn-devel mailinglist or the developer IRC channel (#openvpn-devel at irc.libera.chat). For generic help take a look at our official documentation, wiki, forums, openvpn-users mailing list and user IRC channel (#openvpn at irc.libera.chat).
NOTE: the GPG key used to sign the release files has been changed since OpenVPN 2.4.0. Instructions for verifying the signatures, as well as the new GPG public key are available here.
We also provide static URLs pointing to latest releases to ease automation. For a list of files look here.
This release is also available in our own software repositories for Debian and Ubuntu, Supported architectures are i386 and amd64. For details, look here.
You can use EasyRSA 2 or EasyRSA 3 for generating your own certificate authority. The former is bundled with Windows installers. The latter is a more modern alternative for UNIX-like operating systems.
The Windows installers are bundled with OpenVPN-GUI - its source code is available on its project page and as tarballs on our alternative download server.
We also provide static URLs pointing to latest releases to ease automation. For a list of files look here.
This release is also available in our own software repositories for Debian and Ubuntu, Supported architectures are i386 and amd64. For details, look here.
You can use EasyRSA 2 or EasyRSA 3 for generating your own certificate authority. The former is bundled with Windows installers. The latter is a more modern alternative for UNIX-like operating systems.
The Windows installers are bundled with OpenVPN-GUI - its source code is available on its project page and as tarballs on our alternative download server.
You can download Windows developments snapshots (MSI installers) from here (Index of /downloads/snapshots/github-actions/openvpn2/). Those are automatically built from commits to OpenVPN master branch and include functionality which will be available in the next release. Development snapshots are less stable than releases, so use at your own risk.