How to Setup openSUSE as Router

Setting up openSUSE as router is not too difficult. The setup process only needed a few step to completed, as shown in the following wizard :
Configuration :
[code language=’cpp’]
eth0 IP Address : 197.187.87.0/28
eth1 IP Address : 165.155.121.0/24
Gateway : 197.187.87.1
DNS 1 : 215.155.200.45
DNS 2 : 215.155.200.46
[/code]

1. Activating router function
   [code language=’cpp’]echo 1>/proc/sys/net/ipv4/ipforward[/code]
2. Create a routing with network as a target
   [code language=’cpp’]route add -net 168.155.121.0/24 gw 165.155.121.1[/code]
3. Create a routing table
   [code language=’cpp’]iptables -t nat -A POSTROUTING -s 165.155.121.0/24 -j MASQUERADE[/code]
4. Saving IPTables setting
   [code language=’cpp’]iptables-save > /etc/sysconfig/iptables-net[/code]
5. Make sure IPTables will be started while booting
   [code language=’cpp’]vi /etc/init.d/network[/code]
6. Add the options :
   [code language=’cpp’]iptables-restore < /etc/sysconfig/iptables-net[/code]
7. Save the configuration
8. Check the router function by running ping command from host client into internet address

Reference (Indonesian) :

1. Membuat Router di SUSE