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

[Mike D. <mdi...@en...>]

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

CONFIG_NET_IPIP=3Dy

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<*> IP: tunneling=20

in menuconfig

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AdvThanksance! ;)

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...Mike

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

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Hi all

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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

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            openvpn --mktun --dev tap0

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I get

            Thu Apr 15 13:32:18 2004 0[0]: Note: Cannot open TUN/TAP dev
/dev/net/tun: No such device (errno=3D19)

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=3D2)

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

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Even though it clearly does exist:

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

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

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


Here is /etc/network/interfaces for br0:

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# 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

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/usr/local/sbin/bridge-preup:

maxtap=3D5;

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# 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 "";

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# 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 "";

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/usr/local/sbin/bridge-postdown

maxtap=3D5;

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# 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 "";