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 From:  "Michael Graves" <mgraves at mstvp dot com>
 To:  "m0n0wall at lists dot m0n0 dot ch" <m0n0wall at lists dot m0n0 dot ch>
 Subject:  Re: [m0n0wall] Sip VoIP with no DMZ
 Date:  Mon, 18 Oct 2004 19:21:53 -0400
On Mon, 18 Oct 2004 14:05:38 -0400, Christopher M. Iarocci wrote:

>Mitch (WebCob) wrote:
>
>> 
>>  
>>
>>>From you archives other people have had SIP working with monowall. But all
>>>I
>>>could find had a dmz. Do any of you know of another way to use it? Could I
>>>use 1-to-1 nat with only one public IP? Thanks in advance for the help.
>>>
>>>
>>>    
>>>
>>
>>I'm not an expert on this, but we have started evaluating a couple of VoIP
>>suppliers and one of the two was boasting that their worked behind NAT... I
>>haven't run the software yet, but the other vendor said it couldn't be done
>>so it's possible:
>>a) there are two modes of sip - like active and passive ftp?
>>b) there are built in kernel level proxies like the ones various os's
>>include for FTP which monitor the command channel to properly map the
>>inbound data connections.
>>
>>Would like to know for sure though ;-)
>>
>>m/
>>  
>>
>Vonage works behind NAT with only port mappings without issue.

An other approach to this it to avoid SIP altogether and use IAX2 based
VOIP providers like Voicepulse Connect, NuFone, or VOIPJet. You'd need
as Asterisk iPBX server at your location to handle the local end, but
you'd only have to open up one port (4569) and you'd have a
monsterously powerful system. I use both Asterisk and m0n0wall in my
home office. Both are incredibly powerful open source projects.

Michael Graves
--
Michael Graves                           mgraves at pixelpower dot com
Sr. Product Specialist                          www.pixelpower.com
Pixel Power Inc.                                 mgraves at mstvp dot com

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