[Asterisk-Users] 2 Sip phones behind un-natted Asterisk

[Bruce Komito]

John, In my case, the two ports are not using the same IP port (one is on
5060, the other on 5061), but of course, they are on the same IP address.
I think that is what is confusing the NAT server, but I don't know what to
do about it.

Bruce Komito
High Sierra Networks, Inc.
www.servers-r-us.com
(775) 284-5800 ext 115


On Mon, 24 May 2004, John Fraizer wrote:

> Chad Brown wrote:
>
> > I have 2 SIP phones (Cisco 7960 & XTen) behind a NAT provided by a
> > Linksys firewall that supports UPnP.  The Asterisk server has a public
> > IP. Here are the problems that I am having with this configuration=85
> >
> >
> >
> >    1. The 2 SIP phones can call MeetMe and have a conference but cannot
> >       call each other. (Yes, they connect but no audio either direction=
)
> >    2. I have verify=3Dyes in the sip.conf for both phones. Both phones
> >       constantly go Unreachable. (However, the connection is very fast
> >       between * and sip phones)
> >    3. Sometimes but not always when I try to call phone1 phone2 rings.
> >
> >
> >
> > Is this Nat messing with me or something else? In any case=85Any advice
> > out there?
> >
> >
> >
> > Thanks,
> >
> > Chad
> >
>
>
> The problem is probably that both of your SIP phones are using the same
> port.  I played with two 7960's behind a Linksys on Saturday and finally
> got them playing right when I changed the following:
>
> In Phone 1's SIP[macaddr].cnf:
>
> voip_control_port: 5061
>
> In Phone 2's SIP[macaddr].cnf:
>
> voip_control_port: 5062
>
> The default control port is 5060.  Note:  This is the port that the
> PHONE uses to initiate the connection to * and not the port it is
> connecting to.
>
> John
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