asterisk users - Apr 2005 - Re: Any work around for ISPs that block port ....

From: Joel Jn-Francois <joel@caribtrade.com> wrote:
>Any work around for ISPs that block port 5060 and 69
Is this in the US? The FCC just fined Madison River $15000 for blocking
VoIP traffic. Apparently it's illegal to do this.

original message:
>
> 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
>

There is a very high probability the isp is running nat (or in some cases,
double nat). The OP didn't post enough detail to even take a real guess.

> >Any work around for ISPs that block port 5060 and 69
> 
> Is this in the US? The FCC just fined Madison River $15000 for blocking
> VoIP traffic. Apparently it's illegal to do this.
> 
> original message:
> >
> > 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
> >
> 
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