Re: [Users] Problems registering NAT clients - sr-users

6 Feb 2006

On Mon, 6 Feb 2006, Paco Orozco wrote:

Hola Paco,

I Cc: to the list.

...
   You can see
here that the NAT device is changing the source port from
 5060 to 10145, which is the port used by Openser to send the reply.
 Openser is doing fine while your NAT device is doing wrong because it
 keeps the external rewriten source port when sending the packet to the
 internal side of the NAT (see the second line of the above tcpdump
 trace). 
 You are right, I was confused because I thought that Openser was
 answer me wrong.

  Which NAT device/router are you using?. Are you
forwarding ports from
 the external to the internal side at the NAT device?. 
 My NAT device is a 3Com Office Connect 812. A typical ADSL router. I
 haven't got any forwarding ports external to internal?

 How can i solve this? 
Upgrade the firmware of the router. That model is already known because
the NAT management problems for UDP packets. With the last firmware
version the problem should be fixed.

Saludos
JesusR.

-------------------------------
Jesus Rodriguez
VozTelecom Sistemas, S.L.
jesusr(a)voztele.com
http://www.voztele.com
Tel. 902360305
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