>> Masataka Ohta wrote about STUN >> Is it a client server app or a P2P app? Hi. Well, I read the RFC in some detail, and it is an application which should be on the public internet side on a stable server. Its "clients" could be all kinds of processes/apps, from P2P programs mostly, but its a general resource to decode what a NAT is doing. The RFC reminds the reader there could be lots of transactions sometimes, so it should be scaled for the purpose. Regs, Dan