transfer internet from eth1 to eth0

yerunkar11 · 06-26-2015, 06:52 AM

Hello,

I am using centos 6.6 with latest updates.

Now here in My scenario,

I want to share the internet via my centos.

I have two ethernet cards, Eth1 is primary from which i am using internet.

here i want to share the internet via eth0,

How can do this. please help and thanks in advance.

---------- Post added 06-26-15 at 05:22 PM ----------

and 1 more thing, I have like 20 windows client in my network.

yerunkar11 · 06-26-2015, 06:54 AM

I have also tried doing the echo 1 > /proc/sys/net/ipv4/ip_forward.. this thing wont worked in my scenario

kaushalpatel1982 · 06-26-2015, 07:28 AM

Apart from this configuration you also need to configure iptables masquerade (NAT) all traffic from LAN interface to WAN interface. You need below command to run on your linux router :

Quote:

iptables -t nat -I POSTROUTING -o eth1 -j MASQUERADE

paul2015 · 06-26-2015, 07:55 AM

you must define rc.local script to enable forwarding on startup becouse when you just echo > 1 /proc/sys/net/ipv4/ip_forward after system reboot you will have 0. or you must edit /etc/sysctl.conf define net.ipv4.ip_forward = 1 save and sysctl -p /etc/sysctl.conf