[HECnet] UDP tunnelling over SSH - Solution for people dynamic IP addresses?

[Paul Koning]

"Sampsa" == Sampsa Laine <sampsa at mac.com> writes:

Sampsa> The main disadvantage I can see is that SSH runs over TCP so
Sampsa> any dropped packets might cause more delays than using
Sampsa> straight UDP.

That isn't actually a disadvantage when you travel all the way to the
top of the stack.   Yes, the DECnet network layer (just like IP) uses,
and provides, a datagram service.   But it also uses retransmit
internally for stuff that has to get through, and of course the
transport layer (NSP) makes a reliable service through timeout and
retry.

So a tunnel over TCP is just fine.   It means you have a lossless
network (ignoring congestion in the DECnet nodes).   So instead of
having delays due to timeout and retransmit in NSP, you have the same
delay (or, quite possibly, a shorter delay) due to timeout and
retransmit in TCP.   The overall application performance should come
out essentially the same.

      paul