[Asterisk-Users] Asterisk behind LinkSys NAT Routing

[Martin Pycko]

It's not for phones, it's for asterisk behind a NAT.

Martin

On Mon, 3 Nov 2003, Robert L Mathews wrote:

> At 11/3/03 10:00 AM, Martin Pycko <martinp at digium.com> wrote:
>
> >> Is "externip" and new parameter??
> >
> >It's new. It prevents asterisk from putting the private IP in the messages
> >that asterisk sends with SIP.
>
> Does it take an IP address, like "externip=1.2.3.4"? And does it then
> force the SIP messages for that channel to use the "externip" value
> instead of the server's local IP address?
>
> If so, that's useful; it will help people who know in advance that a
> certain phone is on one side of a NAT or the other.
>
> However, it would be nicer still if it could "fix" the SIP messages only
> when necessary, using a subnet mask or STUN, as has been proposed.
>
> The reason is that hard-coding an IP address to use when communicating
> with a certain client means you can't have a phone in an office (on the
> same side of the NAT as Asterisk) during the day, then take the phone
> home at night (on the other side of the NAT) and have it work without
> changing sip.conf.
>
> --
> Robert L Mathews, Tiger Technologies      http://www.tigertech.net/
>
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