23 Jan
2013
23 Jan
'13
10:54 a.m.
Le 2013-01-23 16:37, William Herrin a écrit :
NAT traversal using port prediction is a Worst Current Practice.
In fact, were someone to use those "worst current practices" to build some generic p2p VPN software, even old games could leverage it to allow someone behind a CGN to host.
Have a look at this: http://tools.ietf.org/html/draft-ietf-behave-lsn-requirements These are the IETF's requirements for CGNs. The intent is to provide guidelines to vendors so that their CGNs can be as harmless as possible. A CGN that obeys these requirements will allow NAT traversal by virtue of having an Endpoint-Independent Mapping behaviour. That is the BCP. Not port prediction. Simon