[Asterisk-Users] port number keeps changing

[Robert Hajime Lanning]

<quote who="Matt Lawson">
> We have an asterisk installation that's on a residential-grade DSL and
> its port number (as visible from the outside) keeps changing, every time
> it registers.  fuser indicates that asterisk is only using port 4569 for
> IAX2 (as it should), but when it goes out over the Internet, the port
> number is reported as something in the 10000's and it changes every time.
>
> Obviously, this is a network issue of some type, but can anyone explain
> more precisely why this happens and how to stop it?  We have some other
> installations that stay put on port 4569 like they're supposed to.
>  Network issues aren't my area of expertise.
>
> Thanks.

You obviously have a "Broadband Router/NAT" device.  This allows multiple
machines to connect to the DSL line, using one IP address.

I would have to say, it is a fact of life, for a network setup like that.
It is a matter of keeping state for the NAT.

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       -MCP