[Serusers] NATHelper + usrloc (+ rtpproxy?)

[Matt Schulte]

Woops meant to send this to list

-----Original Message-----

This is working now, I had my t_relay/forward's below the t_on_reply but
they didn't work. I went back to the default nathelper.cfg and it seems
to work. Also to note, for some reason asterisk, sipura's, and
grandstream's don't seem to work with any uri==myself statements. Even
if you debug sip it'll show it's going to the proper address. 

	Thanks.

-----Original Message-----
From: Greger V. Teigre [mailto:greger at teigre.com] 

Hi Matt,
When a non-NATed incoming call to a NATed client is processed (INVITE),
you must make sure that you have a  t_on_reply("1"); before you call
t_relay (or forward).  The INVITE will not be detected as behind a NAT,
but the destination is (flag is set), and the reply will take care of
the rewrite.
    In your config, it looks like you call t_relay before setting
t_on_reply("1"); further down.  A forward will only forward the SIP
INVITE to another SIP proxy for processing.
    Paul (Java Rockx) just recently posted his config file with a
working NAThelper/RTPproxy setup. I suggest you look at the call logic
found there. His config is also easy to read with a lot of nice headers
    I haven't tested RTP proxy between a client behind NAT and Asterisk,
but I believe that as long as you record-route the INVITE (as you do)
and handle the replies properly, it should work.
g-)