RE: [Openvpn-users] openVPN can't find /dev/net/tun

["Mike Dickson" <mdickson@xxxxxxxxxxxxxxxxx>]

Also, forgot to mention that the tun stuff is compiled directly into the kernel:

CONFIG_NET_IPIP=y

or

<*> IP: tunneling

in menuconfig

 

AdvThanksance! ;)

 

…Mike

 

 

-----Original Message-----
From: openvpn-users-admin@xxxxxxxxxxxxxxxxxxxxx [mailto:openvpn-users-admin@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Mike Dickson
Sent: April 15, 2004 1:36 PM
To: openvpn-users@xxxxxxxxxxxxxxxxxxxxx
Subject: [Openvpn-users] openVPN can't find /dev/net/tun

 

Hi all

 

Here’s one I can’t figure out.  I’m new to OpenVPN so please bear with me…I’m really hoping this is easy and obvious.  When I run

 

            openvpn --mktun --dev tap0

 

I get

            Thu Apr 15 13:32:18 2004 0[0]: Note: Cannot open TUN/TAP dev /dev/net/tun: No such device (errno=19)

Thu Apr 15 13:32:18 2004 1[0]: Note: Attempting fallback to kernel 2.2 TUN/TAP interface

Thu Apr 15 13:32:18 2004 2[0]: Cannot open TUN/TAP dev /dev/tap0: No such file or directory (errno=2)

Thu Apr 15 13:32:18 2004 3[0]: Exiting

 

Even though it clearly does exist:

 

crw-r--r--    1 root     root      10, 200 Apr 13 13:59 tun

 

Has anyone seen this before?  Here is some info on the system and config files I’ve modified so far.

 

Debian “testing” acting as gateway.  Eth0 is internal, eth1 is external. 

Here is /etc/network/interfaces for br0:

 

# New Style: bridged for VPN on br0

auto br0

iface br0 inet static

        address 192.168.1.3

        netmask 255.255.255.0

        network 192.168.1.0

        broadcast 192.168.1.255

#       gateway 192.168.1.3

#        bridge_ports eth1 tap1 tap2 tap3 tap4 tap5

        pre-up    /usr/local/sbin/bridge-preup

        post-down /usr/local/sbin/bridge-postdown

 

/usr/local/sbin/bridge-preup:

maxtap=5;

 

# Creat the tunnel interfaces

echo -n "OpenVPN: Creating bridge interfaces:";

for i in `seq 1 ${maxtap}`; do

    openvpn --mktun --dev tap${i};

    echo -n ".";

done

echo "";

 

# Create the bridges for each tap

echo -n "OpenVPN: Creating TAP interfaces:";

for i in `seq 0 ${maxtap}`; do

    brctl addif br0 tap${i};

    echo -n ".";

done

echo "";

 

/usr/local/sbin/bridge-postdown

maxtap=5;

 

# Create the bridges for each tap

echo -n "OpenVPN: Removing bridge interfaces:";

for i in `seq 0 ${maxtap}`; do

    brctl delif br0 tap${i};

    echo -n ".";

done

echo "";

echo -n "OpenVPN: Removing tap interfaces:";

for i in `seq 1 ${maxtap}`; do

    openvpn --rmtun --dev tap${i};

    echo -n ".";

done

echo "";