asterisk users - Apr 2005 - Any work around for ISPs that block port 5060

Are you sure it is not your firewall that blocks the outgoing packets to
them? 
I am pretty sure Asterisk follows whatever port you tell it to. If the
phone is registered with the correct port it will use it. I have used a
Sipura phone on port 5061 and it worked just fine. This part should be
pretty obvious by doing "sip show peers" in the CLI

You might also need to do the following tests:

1) make sure they can indeed received UDP packets on certain port other
than 5060 (maybe they have other ports blocked as well)
2) make sure your firewall is not blocking this traffic
3) make sure this is the port they have registered with
4) debug the sip channel and look for the ports in the headers
> 
> ----- Original Message ----- 
> From: "Joel Jn-Francois" <joel@caribtrade.com>
> To: <asterisk-users@lists.digium.com>
> Sent: Tuesday, April 19, 2005 8:48 AM
> Subject: [Asterisk-Users] Any work around for ISPs that block port 5060 
> and69
> 
> 
>> I have a several friends registered on my asterisk box that are
>> experience  problems with their ISP blocking SIP default ports 5060 and
>> tftp port 69.  Is there any way around this problem or are they forever
>> doomed to VOIP  since their ISP is pretty much the only ISP company on
>> that island.  So far  I was able to have them change their default SIP
>> port to 6070 and any  packets coming in on that port on my asterisk box
>> I would redirect to port  5060.  That seem to be working fine, expect
>> that they can make calls but  cannot receive calls.  I think part of
the
>> problem might be that when  asterisk tries to initiate a call to their
>> sip phone it tries on port 5060  instead of 6070 even though I have
>> specified in the sip.conf that their  port is 6070.  Has anyone else
>> encountered this problem and was able to  resolve it?  My other option
>> is to change my asterisk box to work  completely on a different port,
>> but I am reluctant to do so since the  majority of registered users for
>> now do not have an issue with port 5060  being blocked by their ISP.
>> 
>> Thanks for your help.
>> 
>> Joel