net config

webcast · 08-23-2004, 09:19 AM

Hello,
i have this problem and i would like some help from someone who knows
i have a pc with a slack 9.1 and i would like to use it like a gateway to internet so i can serve 2-3 more pcs that i own.
i have a static ip and a dsl line. linux has 2 network cards
one of those has as real ip on internet 212.89.XXX.XXX and the other one that looks like 192.168.0.1
i want the pcs to have IPs in the form of 192.168.0.XXX . i want the pc which are on the same LAN with the linux one to use it as a gateway
thanks in advance

freeborn · 08-23-2004, 10:53 AM

here you are, man.

echo 1 >/proc/sys/net/ipv4/ip_forward # Enable IP forwarding
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A FORWARD -i eth1 -j ACCEPT

where is eth0 - your network card, that has real ip on internet. eth1 - your network card which is connected to your lan. don't forget to put this as a startup script and to tell other machines the ip of your gateway.