[SOLVED] Routing

Winanjaya · 03-24-2010, 03:04 AM

Dear All,

My Internet Router is on 64.1.1.1

I have 2 NICs in my Linux Box: (Firewall OFF)

Eth0 -> 64.1.1.2 and cross-cable connected to Internet Router (64.1.1.1)
Eth1 -> 192.168.1.1 Connected to switch hub

Default gateway of Eth0 is to Internet Router (64.1.1.1)

From Linux-Box.. I able to ping to internet(ie. ping 202.158.3.7)

Client PC: (Firewall OFF)
Default Gateway is 192.168.1.1

I am unable to ping to internet (ie. ping 202.158.3.7)

Could any body please advise.. what I missed?

thanks & regards
Winanjaya

kainosnous · 03-24-2010, 03:22 AM

If you are trying to forward packets from a client through your Linux box, you will need to enable forwarding

Code:

echo 1 > /proc/sys/net/ipv4/ip_forward

However, you may also want to use NAT to share the same IP address as your Linux box. You can do that with iptables. It might look similar to this:

Code:

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A FORWARD -i eth0 -o eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT