Root access, preferably on both computers.A computer to act as the client (this will usually be your laptop, on the go.).One computer accessible on the internet that is not firewalled (or at least allows incoming ICMP packets).So what do you need for all this to work? Authentication, to prevent just anyone from using your proxy.Acceptable bandwidth (150 kb/s downstream and about 50 kb/s upstream are the currently measured maximas for one tunnel, but with tweaking this can be improved further).Connections are reliable (lost packets are resent as necessary).Tunnel TCP using ICMP echo request and reply packets.Ptunnel is not a feature-rich tool by any means, but it does what it advertises. With ptunnel, you can utilize this feature to check your mail, or do other things that require TCP. What to do? By chance, you discover that the network will allow you to ping any computer on the rest of the internet. The network gives you an IP address, but won't let you send TCP or UDP packets out to the rest of the internet, for instance to check your mail. Setting: You're on the go, and stumble across an open wireless network. The following example illustrates the main motivation in creating ptunnel: At first glance, this might seem like a rather useless thing to do, but it can actually come in handy in some cases. Ptunnel is an application that allows you to reliably tunnel TCP connections to a remote host using ICMP echo request and reply packets, commonly known as ping requests and replies.
Ping Tunnel - Send TCP traffic over ICMP Ping Tunnel For those times when everything else is blocked.
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