If you’re on a network that requires authentication or paid access, but allows pings, you can use a ping tunnel to get online without having to subscribe to the network.
You can download Hans ping tunnel software and install it onto your dedicated server (or even a VPS) . Then you simply run the local script in a command prompt (terminal). You can then create an SSH socks5 proxy to the dedicated server over the new ping tunnel link you created.
Many 3g cell networks that allow pay as you go access will continue to allow pings even when you’ve run out of credit/load. That means a ping tunnel can be used to get online.
You may be thinking that a tunnel operating via pings would be slow, but it can easily reach speeds of 400Kbit/second!