how to set gre tunnel

[Guest]

[gakto]

Hello,
I have a linux router (centos 6) that uses gre tunnel to get the internet!

My settings:
ip tunnel add tun0 mode ipip remote 10.9.0.xx local 10.9.4.xx dev eth1
ifconfig tun0 188.130.xx.x/30 pointopoint 188.130.xx.x
ifconfig tun0 mtu 1500 up

help me set up gre tunnel at endian 2.5.2

thanks in advance!