[asterisk-users] Sending calls from behind NAT

[bilal ghayyad]

Dears;

It seems my service provider is requesting a complicated settings to allow me to send from behind NAT. 

What they said:

"It shouldn't matter as long as you are handling the NAT correctly your end. We do not fix NAT so if you're sending internal addresses in your INVITEs or SDP then things will fail but if you're handling it correctly, we shouldn't tell the difference".


Really, I did not understand what exactly they need. But maybe what they need is to see my public IP address without the private IP address (this what I understood if I am right).

I tried to use the following in the [general] settings in the sip.conf

localnet=192.168.10.2/255.255.255.254
externadd =196.40.164.239

But even, the calls are drop .. so what I have to do?

The following what I get when I enabled the sip debug:


<--- SIP read from UDP:194.0.220.220:5060 --->
SIP/2.0 403 UA behind NAT not accepted here
Via: SIP/2.0/UDP 192.168.10.2:5060;branch=z9hG4bK123c8781;rport=5060;received=196.40.164.239
From: "asterisk" <sip:gwbilalkwpbx at 192.168.10.2>;tag=as45d7c63b
To: <sip:9617565116 at outbound.exxs.com:5060>;tag=84f31a80f7bc633204d0bd8d76e9cb24.53a5
Call-ID: 6f68f414109ba1ff596726c74a0cb5ac at 192.168.10.2:5060
CSeq: 102 INVITE
P-Behind-NAT: source
Server: Service Provider Global Proxy v2
Content-Length: 0

So what could resolve my problem?

Regards
Bilal