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Re: [Openvpn-users] Re: All NICs are unusable after install of OpenVPN

  • Subject: Re: [Openvpn-users] Re: All NICs are unusable after install of OpenVPN
  • From: "Brett E. Mueller" <Brett.Mueller@xxxxxxxxx>
  • Date: Fri, 07 Oct 2005 08:14:40 -0700

Hash: SHA1

On 10/7/2005 07:03, Roger Håkansson wrote:
> Yup, when he uninstalls openvpn the NICs work and the machine doesn't
> seem slow anymore, but as soon as he installs any openvpn-2.0 version
> and reboots, the machine is basically useless (due to no network
> conectivity and GUI-response is slow)

Not sure if this applies, but maybe this will help:

Some of my users have XP laptops that have built-in utilities that try
to make wireless networking as idiot-proof as possible.  Unfortunately,
some of these utilities break networking when using OpenVPN.  One in
particular will monitor all of the network interfaces, and select an
interface (based on some type of prioritizing -- I can't remember) to be
active if it is available.  It will shut off all other interfaces except
the one that is active.  I have observed the 802.11 interface come up,
the OpenVPN tunnel just makes its connection, and then all networking
comes to a stop.  The idiot-proof networking utility had just disabled
the radio interface when it discovered the VPN tunnel (TAP interface)
was active.  <sigh>

My answer was (and is) to simply disable the laptop manufacturer's
networking utility and take a more manual approach (relying on the
Atheros or Intel client managers with profiles).  It's still relatively
simple, and doesn't break everything with OpenVPN.

Hope this helps,


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