I have heard of three approaches for NAT traversal
1. Stun
2. Skype
3. Hamachi
Does anyone know if Skype & Hamachi just use protocol based on STUN logic or
are they doing anything smarter. Has anyone tried to decipher network traffic
of Skype or Hamachi and found any interesting patterns/logic ?
I tried to use network sniffer today on Skype traffic and found UDP packets to
open large number of ports on my home router.
Can anything be done using ICMP packets for NAT traversal?
Look forward to good discussion on this topic
Arvind
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