[Asterisk-Users] Why NAT problem

[Tom Rymes]

This is not technically true. For instance, you can take a Cisco 79X0
and put it behind NAT and it will work without port forwarding. You do,
however, have to program the phone to enable the NAT features. (There
are two, I can't remember their names, though.) I have generally left
the WAN IP address blank, with no noticable ill effects, but that might
not be a good idea. 

Also, I believe that you can do this with multiple phones, so long as
you use different port numbers for each phone (5061, 5062, etc)

Tom

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com 
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> Rudolf Ladyzhenskii
> Sent: Saturday, August 13, 2005 9:53 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] Why NAT problem
> 
> 
> At firewall/NAT you have to do port forwarding.
> 
> If your phone is at port 5060, NAT device will receive a 
> connection and has 
> to know that it is destined for your SIP phone. So, forward 
> port 5060 to the 
> phone.
> 
> Rudolf
> 
> 
> ----- Original Message ----- 
> From: "Kamran Ahmad" <p_kami at yahoo.com>
> To: <asterisk-users at lists.digium.com>
> Sent: Sunday, August 14, 2005 6:52 AM
> Subject: [Asterisk-Users] Why NAT problem
> 
> 
> > hello
> >
> > i am using asterisk-1.0.9. i have a NAT problem.
> > without NAT registration is ok. and if user is bhind
> > NAT it is registring on asterisk. but SJPhone is
> > showing "not registered". i think asterisk is properly 
> sending request 
> > to UA. any comments............this sip.conf setting was working 
> > previously
> >
> >   -- Registered SIP '5000' at 0.0.0.0 port 5060
> > expires 120
> >    -- Saved useragent "SJLabs-SJphone/1.40.258" for
> > peer 5000
> >
> > [general]
> > context=default
> > port=5060
> > bindaddr=0.0.0.0
> > srvlookup=yes
> > nat=yes
> > canreinvite=no
> >
> > [5000]
> > type=friend
> > port=5060
> > canreinvite=no
> > host=dynamic
> > nat=yes
> > insecure=yes
> > auth=plaintext
> >
> >
> >
> >
> >
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