[Asterisk-Users] SIP and NAT

[denon]

I'm having some problems getting an ATA186 behind NAT working.  When I had 
it on the same subnet as the Asterisk server, it worked fine.  Now Ive 
taken the ATA on the road with me, and it's behind a Dlink router+firewall, 
doing NAT.  I pick it up, hear a dialtone .. the firewall on the asterisk 
side presently has everything open to this subnet, so I know that's not 
really an issue. (what needs to be open, though?)

Here's what the * server is giving me in SIP debug, though:


9 headers, 0 lines
Interface is eth0
IP Address is 1.0.0.1
Using latest request as basis request
Sending to 192.168.0.150 : 5060 (non-NAT)
Transmitting (no NAT):
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.0.150:5060
From: sip:ata1862 at 1.0.0.1
To: sip:ata1862 at 1.0.0.1;tag=6b5fab60
Call-ID: 1179889768 at 192.168.0.150
CSeq: 1 REGISTER
User-Agent: Asterisk PBX
Contact: <sip:ata1862 at 1.0.0.1>
Content-Length: 0


Suggestions?  (IPs have been changed to protect the innocent)

Thanks for any help you can give -- I was sort of relying on using this 
while I'm on the road.