Christer Holmberg writes:

 > I agree it's a prectial way, but is that how UAs work today?

some are able to send CRLFs and almost all allow the user to set the
registration interval.  i don't know if UAs automatically use short reg
int if behind nat.

 > I am happy if we can do things without yet another addition to the
 > protocol, but doing things based on assumptions on how we THINK UAs
 > should work isn't going to be very useful.

then write down the above, i.e., tcp UA behind nat should use crlf
(preferred) or short reg interval.

-- juha
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