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Peer-to-Peer with VB .NET Review by Kevin Crenshaw
P2P - When you can connect :-(
This book is a great starting point if you want to explore how to set up your own peer to peer network. It walks you through how to set up a file sharing program, an instant messenger, and a shared computing system. However, it leaves out what I believe to be one of the most important aspects of peer to peer programming - NAT traversal. The book deals with this subject in a very superficial way by telling you to seek out 3rd party solutions instead of showing you how to do it yourself - leaving you to figure out the details of this subject on your own. This would have been a 5 star book if this subject had been covered in greater detail.
I have found that NAT traversal is possible by implementing UDP hole punching techniques. However, I have not found any explanation for how to do it with .Net....yet.