The Ancient Art of Tunneling, Rediscovered

This article will teach you how to use pay-per-use wireless networks for free. It works on many (but not all) networks (wireless or not), and is based on a very simple principle: Tunneling. I'm sure we have all seen how useful tunnels can be, be it for making our communications secure over an ssh tunnel or to spoof your IP. This article will show you how to tunnel TCP connections over ICMP packets.