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


  • Subject: RE: [Openvpn-users] openVPN can't find /dev/net/tun
  • From: Kai Dittmann <kd-news@xxxxxxxxxx>
  • Date: Fri, 16 Apr 2004 07:43:13 +0200

Am Do, den 15.04.2004 schrieb Mike Dickson um 19:45:
> Also, forgot to mention that the tun stuff is compiled directly into
> the kernel:
> 
> CONFIG_NET_IPIP=y
> 
> or 
> 
> <*> IP: tunneling 


Hello Mike,

	you have to activate:
	"<*> Universal TUN/TAP device driver" support
	found under "[*] Network device support"
	IP/IP Tunneling is wrong.



cheers,
--- KD


> 
> 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 "";


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