One of the less intuitive networking tasks often performed on Linux boxes is the connection sharing process. Here is a short clip to show you how iptables works.

Tips

• Use iptables -t nat -I POSTROUTING -s 192.168.0.1/24 -j MASQUERADE to set up a dynamic masquerade (the most popular way of sharing the connection where your internet IP is likely to change)
• Remember to replace 192.168.0.1/24 with your local area network IP and mask in the above example

Download and watch

Using iptables to share your internet connection (0.3MB)