[p2p-hackers] Spoofing source address to tunnel through address-restricted/symmetric NAT

[Antoine Pitrou]

> With this in mind:
> 
> 1) How do you spoof UDP source identities?
> 
> 2) Have you heard of anyone using this for NAT piercing?
> 
> 3) How good is "the internet" (by which I mean current deployed 
> hardware) at identifying and blocking spoofed UDP packets?

If I were you, before asking technical questions, I would ask myself
whether relying on source address spoofing is really desireable
policy-wise and reputation-wise. Even if the application using the hack
is not malicious per se.

I mean, if there's a source address in UDP packets, it's not meant for
people to forge/abuse it... ;)

Regards

Antoine.