[Asterisk-Users] SIP Extension behind NAT, Asterisk on a public domain

[Bharath]

I found out that I have a faulty Belkin Router which was causing the
problem. I tried forwarding ports as well as DMZ'd the Sip device but still
could'nt not hear the voice. So i plugged the sip device directly to the
cable modem & it worked fine. So my guess is that though I have set up the
router to forwards port to the sip device there is something happening at
the router that is blocking the RTP ports (10000-20000).
Thanks


On 11/24/05, Tom Rymes <trymes at cascadelinksystems.com> wrote:
>
> On Nov 23, 2005, at 11:04 AM, Manny A. Wise wrote:
>
> [snip]
> > Well, as the user stated on the original message, the asterisk
> > server is behind a NAT and the client is also behind a NAT….
> >
> > if you make it work just by opening ports, let me know..I have
> > never been able to get it to work, that's why I don't use sip, just
> > plain iax2 for everything… J
> >
> > Manny
> >
> Manny,
>
> I have this working as I write this. (I just hung up the phone.) In
> fact, I brought a Cisco 7940G to a completely unknown nat-ed network
> the other day, plugged it in and started making calls right away.
> Here's the setup I have for this specific configuration:
>
> 1.) Asterisk server behind NAT. (Setup as DMZ on Linksys WRT54G, but
> it's still NAT. I just don't have to forward ports this way)
> 2.) externip, localnet, nat settings configured in the sip.conf file
> (sip_nat.conf for Asterisk at Home)
> 3.) Cisco phone (or whatever SIP UA you choose) configured for NAT
> (via the SIP<MAC>.cnf file for Cisco)
> 4.) Lather, rinse, repeat if necessary
>
> Hopefully that will work for you. I'd rather use IAX and avoid these
> problems altogether, but I have yet to find an IAX hardphone I am
> willing to use. In fact, for softphone use, I do indeed use IAX via
> LoudHush for the mac. (Great piece of software, BTW. No connection
> here, just a happy user...)
>
> Tom
>
> --------------------
> Tom Rymes
> Cascade Link Systems
> www.cascadelinksystems.com
> (603) 375-1414
>
> "Intelligent technology solutions for small businesses."
>
>
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