[asterisk-users] Why is this happening?

[Matt]

Ok I understand all that... Just wanted to confirm that A) it was the
remote router mangeling the port and B) that it wouldn't cause an
issue (I wasn't 100% sure if it would.. since only the 4569 port is
open on the firewall).

Could this cause an issue?  If only 4569 is open on the firewall, and
IAX tries to setup the connection and then move to a port that isn't
opened wouldn't this cause one-way audio, or no audio at all?

On 10/16/06, Time Bandit <timebandit001 at gmail.com> wrote:
> > Thanks for the answer, but I don't buy it.  There are currently 0
> > calls up on that bridge, while another connection which has calls up
> > on it is on Port 4569.. please try again.  IAX2 is suppose to run on
> > ONLY one port.. this is why it is so nice for use in firewall
> > situations.
>
> It doesn't change a thing !
>
> Same thing happens with a webserver. It listen for connections on port
> 80 (default port) and when a connection comes in, it is handed to
> another free port on the server so the "main" server can continue
> listening on port 80. Same thing with FTP, etc. All TCP servers that
> accept more than one connection
>
> I think that what "iax2 show peers" display is the remote port from
> which the client connected. iaxclient library defaults to using port
> 4569 as the originating port but there is a function to specify
> another port.
>
> Check on your machine while you're surfing the web, your browser
> doesn't use port 80 as the originating port. Connect to an FTP server
> and check your netstats, you'll see that you're not connected to port
> 21 on the remote server
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