Creating TUN device for IPSEC
Is it possible to create a separate device (like tun made by openvpn) for ipsec? If yes how can I do it?
Yes, you can.
Exactly how to do this will depend on your situation.
Here's a bare-bones way to do it:
Load the kernel module.
/sbin/modprobe tun
Create the tunnel device
cd /dev
sudo MAKEDEV tun
This will create /dev/net/tun .
Use openvpn to create tun0 .
sudo openvpn --mktun --dev tun0
Optionally, edit /etc/network/interfaces, and bring up tun0 .
sudo ifup tun0