[Serusers] Nathelper natping-interval malfunction.

Younger Wang wygmail at yeah.net
Fri Jun 27 18:47:19 CEST 2003


Thanks for your details, Andrei!

Younger Wang

----- Original Message ----- 
From: "Andrei Pelinescu-Onciul" <pelinescu-onciul at fokus.fraunhofer.de>
To: "Younger Wang" <wygmail at yeah.net>
Cc: <serusers at lists.iptel.org>
Sent: Thursday, June 26, 2003 8:24 AM
Subject: Re: [Serusers] Nathelper natping-interval malfunction.


> On Jun 23, 2003 at 15:09, Younger Wang <wygmail at yeah.net> wrote:
> > I am testing Nathelper module. It works well delivering SIP messages.
> > However, natping-interval function seems malfunction.
> >
> > The NAT scenario is simulated by a microsoft ICS. There is a Cisco ATA
> > behind NAT with internal address 192.168.0.2 and it's mapped to external
> > address 192.17.1.22. Ser is listening on external address 192.17.1.173.
I
> > added "modparam("nathelper", "natping-interval", 5) " to the
nathelper.cfg
> > file.
> >
> > When ATA registered to Ser, I noticed 192.168.0.2:5056(UDP) is mapped to
> > 192.17.1.22:1025(UDP). Register is successful and call could be
established
> > between internal ATA and external ATA(one way audio).  It's expected
that
> > Ser should send a UDP packet to 192.17.1.22:1025(UDP) every 5 seconds.
> > However, the UDP packet is actually sent to 192.17.1.22:260(UDP). I
wonder
> > what's the problem?
>
> 260 is htons(1025). There was something like this fixed recently by the
> nathelper module author, so please try updating to the latest cvs
> (0.8.11dev34), or the latest cvs 0_8_11 pre-release (0.8.11pre34)
> (cvs update/checkout -r rel_0_8_11).
>
> Andrei



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