[Freeswitch-users] NAT type unknown, ExtIP empty, and ACK timeout

[Yihui Li]

SIP trace on the external FS server give the following

send 386 bytes to udp/[192.168.0.8]:5060 at 19:44:02.932215:
   ------------------------------------------------------------------------
   ACK sip:tttt at 192.168.0.8:5060;transport=udp SIP/2.0
   Via: SIP/2.0/UDP 178.79.156.136:5080;rport;branch=z9hG4bKXKvp0eHNU6t8S
   Max-Forwards: 70
   From: "" <sip:0000000000 at 178.79.156.136>;tag=pUtN7g4DcUtmj
   To: <sip:tttt at 95.172.231.192>;tag=FBttS33jBre1j
   Call-ID: b66f4c06-3d8e-1230-2488-fefdb24f9c88
   CSeq: 30206641 ACK
   Contact: <sip:mod_sofia at 178.79.156.136:5080>
   Content-Length: 0

do this mean the ACK was sent to the private IP address instead of the
correct public ip address?

On Sat, Jun 30, 2012 at 8:24 PM, Yihui Li <xyangni at gmail.com> wrote:

> Hi,
>
> I am running FS behind a nat, however the nat does not seem to work and
> nat_map status shows:
> NAT type unknown, ExtIP empty.
>
> My call to the server on external context always get disconnected in about
> 30 seconds.
> Siptrace indicate a ACK timeout as the reason.
>
> I am using a TP-Link router and already set the server as DMZ host. Can
> anyone help? Thanks
>
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