Answer / anoop

above anwser also write,
but must me know this,

vi /etc/sysctl.conf


# Controls IP packet forwarding
net.ipv4.ip_forward = 1

save &

sysctl -p

Answer / thilak.r.s

Give the following command

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

Answer / bhupendra singh jhala

follow following command

1.) vi /etc/sysctl.conf

# Controls IP packet forwarding
net.ipv4.ip_forward = 1

save (:wq!)

You should have a Two physical LAN card, if You have't two
Lan cat. You have to creat virtual Lan card

2.) cp -arvf /etc/sysconfig/network-scripts/ifcfg-
eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:1

3.) Set a diffrent Class IP in virtual Lan card

4.) start network service
/etc/init.d/network restart

Answer / anindian

1st answer is correct till you boot your Linux machine, once
rebooted, its gone coz the /proc is a fs that is resident on
memory, thus if you want to forward your packets permanently
then you have to alter the net.ipv4.ip_forward parameter to
reflect the changes each time machine is booted. # sysctl -p
makes it effective without reboot.

Answer / mahendra yadav

iptables -I FORWARD -i eth0 -o eth1 -j ACCEPT

iptables -I FORWARD -i eth1 -o eth0 -j ACCEPT

vim /etc/sysctl.conf
net.ipv4.ip_forward = 1
:wq

/etc/init.d/iptables save

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