Sharing Internet connection from your Linux

I want to share my Interent connection from my linux to another equipment.

First you have to enable NAT in your linux,
as root you must type:

# iptables -t nat -A POSTROUTING -o tun0 -j MASQUERADE

Then, logged as root, you have to enable IP forwarding.
There are two ways:

# sysctl -w net.ipv4.ip_forward=1

or

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

Now you have to configure in your other device the IP of your linux as default gateway.

And that’s all folks!

If you have problems with iptables and you want to remove all the rules write:

iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT