So you are sending registration packets out but you aren't getting anything back? I would try a few different things. First, for testing, try moving your gateway over to the internal profile. I'm wondering if they are trying to send stuff back to port 5060.

-MC

On Wed, May 9, 2012 at 10:24 AM, Fernando Di Nucci <f.dinucci@alice.it> wrote:
First of all thank you for your time.

According to your suggestions I tried:

<include>
    <gateway name="voipstunt">
      <param name="username" value="*********"/>
      <param name="password" value="*********"/>
      <param name="realm" value="voipstunt.com"/>
      <param name="proxy" value="sip.voipstunt.com"/>
      <param name="expire-seconds" value="800"/>
      <param name="register" value="true"/>
      <param name="retry-seconds" value="60"/>
      <param name="caller-id-in-from" value="false"/>
      <param name="context" value="public"/>
    </gateway>
</include>

after issuing at fs_cli console:

/debug 9
sofia profile external siptrace on

I get

   ------------------------------------------------------------------------
2012-05-09 19:18:39.041881 [WARNING] sofia_reg.c:405 Timeout Registering
voipstunt
2012-05-09 19:18:40.041894 [WARNING] sofia_reg.c:429 voipstunt Failed
Registration [0], setting retry to 60 seconds.
send 645 bytes to udp/[77.72.169.134]:5060 at 17:18:40.065594:
   ------------------------------------------------------------------------
   REGISTER sip:sip.voipstunt.com;transport=udp SIP/2.0
   Via: SIP/2.0/UDP 192.168.30.30:5080;rport;branch=z9hG4bK2XryvegBXNejD
   Max-Forwards: 70
   From: <sip:*********@sip.voipstunt.com;transport=udp>;tag=2crj3HatDt40g
   To: <sip:********@sip.voipstunt.com;transport=udp>
   Call-ID: 35f3320b-4bd0-414a-8324-0a98c411f6c6
   CSeq: 27955864 REGISTER
   Contact:
<sip:gw+voipstunt@192.168.30.30:5080;transport=udp;gw=voipstunt>
   Expires: 800
   User-Agent: FreeSWITCH-mod_sofia/1.0.head-svn-exported
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO,
REGISTER, REFER, NOTIFY
   Supported: timer, precondition, path, replaces
   Content-Length: 0

   ------------------------------------------------------------------------


repeated many times.

I'm new to freeswitch, so if a have to do something different, please
let me know.

Thank you

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