[Asterisk-Users] Asterisk to sip client behind Firewall/NAT -cancall but cannot receive calls ?

[Robert Rozman]

Hi,

I hope I won't bother too much if I ask you to provide some more info about
your setup, particularly which ports are open and other things (like how
often does Grandstream register, do you use keep alive, etc...).

Having that information I could rule out settings and maybe start searching
on Firewalls...

Thanks in advance,

regards,

Robert.

----- Original Message ----- 
From: "Shoval Tomer" <shoval at softov.co.il>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<asterisk-users at lists.digium.com>
Sent: Tuesday, December 14, 2004 11:30 AM
Subject: RE: [Asterisk-Users] Asterisk to sip client behind
Firewall/NAT -cancall but cannot receive calls ?


Check your FW-1 tracker and see if any sip packets are dropped during
call initiation.
I had this problem and it went away when I upgraded the BT's firmware to
the latest (16).

Beware, though, that people on the list claim that this firmware breaks
functionality of the message button and autoanswer.
I haven't checked this yet, cause I can't afford to go back a version.
I prefer a phone that can call then a phone that can autoanswer...



> -----Original Message-----
> From: Robert Rozman [mailto:rozman at fri.uni-lj.si]
> Sent: Tuesday, December 14, 2004 11:24 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: [Asterisk-Users] Asterisk to sip client behind Firewall/NAT -
> cancall but cannot receive calls ?
>
> Hi,
>
> I have following setup:
>
> BT100 ---- Firewall/nat 1 (www.ipcop.org) ---- Internet
----Firewall/nat2
> (Vigor) ---- Asterisk .
>
> I'd like to use BT100 as local extension to Asterisk. I've done simple
> setup
> and BT100 can call Asterisk and place outgoing calls. However I cannot
set
> him to qualify, cause it is claimed as unreachable.
>
> I have port redirection at Firewall 1 (to 5060 and rtp 5004 to
> grandstream)
> and 5060 and rtp ports on Firewall2. But I guess I am missing
something.
> I've setup Asterisk to work behing nat and it works OK, on same route
and
> same local network Iax phone is operating also ok in both ways.
>
> On grandstream I've setup public NAT adress, then keep alive to 10
sec,
> (tried also some other setups but didn't work).
>
> I'm so close to working state, so would kindly ask for any guidance
(to
> save
> my hair) :-)
>
> Also I'm missing some understanding of SIP in this story: on what
ports on
> Asterisk machine does Grandstream connect RTP ?  Do I have to transfer
> some
> other ports on Firewall2 because of Grandstream RTP connection ? If
> everything works on outgoing calls there must be some little condition
> that
> gets changed when I try to reach grandstream - what could that be ?
>
> If anyone has working scenarion, please be so kind to help.
>
>
> Regards,
>
> Rob.
>
>
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