Sept. 22, 2008
1:06 a.m.
It's not easier to get UDP through NATs. It's just as hard or harder.
It must be a widely held error, then, because it's what I hear every time the subject arises. My understanding was that since UDP doesn't have the concept of "streams," most NATs will allow all UDP packets through to a given port one it is first hole-punched. Nat traversal aside, I'm also concerned about performance, and since TCP doesn't make in-order delivery optional, I'm still tempted to stick with UDP...