[Asterisk-Dev] Re: [Asterisk-Users] problem facing on Firewall, NAT and asterisk

[Isamar Maia]

Hi Prasad,

Install a Asterisk in your DMZ and one Asterisk inside of your Lan.
Set them to use IAX between them passing through your firewall.
A) Your SIP Phones in your lan will connect to your LAN's *.
B) The SIP Phones in the internet will connect to your DMZ's *.
C) A connnects to B through the Asterisk's IAX connection....

SIP doesn't work with firewalls.

Also, next time, post this kind of message in the asterisk-users list.

Isamar



On Wed, 3 Nov 2004, prasad_s wrote:

> Hi all,
>
> I am using asterisk, which is running on one machine having static(global) IP.
> I have another machine(Internet server with global IP, with firewall) working as gateway for internal machines having local IP starting with 192.168.xxx.xxx.
> My SIP client(xten-xlite) is on LAN machine and registers to the asterisk server through this sip phone.
> All machines on the LAN, having sip phone are registered to asterisk server.
> But the problem is when I call internally between two sip client I don't get voice path between these two sip phones, i.e. I can not talk and hear from both phones,
> though I get message on the asterisk server "connected".
> Is this because of Firewall and NAT between my sip client and asterisk server?
> But then how I get register to asterisk server?
> Is there any workaround for this problem
>
> regards
> Prasad Somwanshi.
>