[Asterisk-Users] SIP, NAT and Firewalls

[Michaël Gaudette]

Hello,

I'm a bit new to SIP, and I've set up a SIP line with Asterisk and my
wholesale provider.  That worked, fine.  I ahd to open up the ports on my
router, forward them to the correct box, again fine.

Now, if I get one of my customers to connect his SIP phone to my Asterisk
box, and HE'S behind a NAT firewall, does he have to go through the same
process, or is it just the Asterisk box that needs to translate the SIP and
RTP port?

In other words: if my SIP phone is behind a Linksys router, do I need to
configure the Router for any reason?

Mike