[Twisted-Python] Vertex or other P2P libraries for twisted?

[makkalot at gmail.com]

 >On the other hand Twisted users might be
> interested in hearing about semi-transparent NAT traversal and federated
> authentication...

Hi, i want to know what the vertex actually is. Because i had in my mind to 
develop a NAT traversal software that other applications can use easily. Is 
vertex a STUN server what is it :) And you mentioned about authentication 
which is another exciting part i want to add.