SIP Coned NAT - Assistance

fluk3d · Dec 18, 2009, 8:17 PM

Hello - I have been trying to get this working however, I ran into a few problems. After researching it appears that there is an issue with Conned NAT and SIP.

My current setup ->

DSL (pppOE) pfSense -> Switch -> ATA(voip)

I read you must utilize advanced NAT however I'm not really sure how to set this up. My WAN interface is always going to get a dynamic IP so should I be setting up a virtual IP and selecting WAN putting in a dummy IP?

any help would be fantastic at this point as I'm not really sure how to proceed?

GruensFroeschli · Dec 18, 2009, 8:28 PM

http://doc.pfsense.org/index.php/Static_Port

However for SIP there are already predefined rules which are active per default.
Are you running on a nonstandard port?

fluk3d · Dec 18, 2009, 8:32 PM

Yep I spoke to my ISP my ATA needs the following forwarded

5060-5082

and 20000 to 20011 which I have done, I changed the outbound nat to advanced and enabled Static Mapping still no successful sip registration

GruensFroeschli · Dec 18, 2009, 8:53 PM

Did you actually forward these ports?
Just enabling static ports is not enough.

fluk3d · Dec 19, 2009, 12:45 AM

Yep ports have been forwarded, and nat rules have been created. voip company offered little help I attached some screenshots if anyone see's anything I might be missing?

GruensFroeschli · Dec 19, 2009, 2:24 AM

Strange….
Looking at your screenshot i would say everything is in order and it should work.

What voip provider are you using?

fluk3d · Dec 19, 2009, 2:27 AM

cia.com it's through my ISP

strange thing is I connect it directly to my modem and the voip works fine. I ran a packet capture it seems like its failing to register

GruensFroeschli · Dec 19, 2009, 2:52 AM

How exactly do the frames coming from the pfSense differ in comparison to the frames sent when connected directly to the modem?