[Serusers] NAT ping and consumer router

[Dave Bath]

Hey there,

At home I have Netgear ADSL router (1 x ADSL, 4 x eth) and have not had
any problems with NAT devices dropping off.  Mainly use Zyxel Wireless
2000 handsets.

Dave

-----Original Message-----
From: serusers-bounces at iptel.org [mailto:serusers-bounces at lists.iptel.org] On
Behalf Of Jesus Rodriguez
Sent: 22 August 2004 19:59
To: Richard
Cc: serusers at lists.iptel.org
Subject: Re: [Serusers] NAT ping and consumer router

On Sun, 22 Aug 2004, Richard wrote:

> Does anyone know and use a consumer router which works with NAT ping?
>
> I did some research recently and can't find any. Basically if a phone
is
> behind NAT, we need to keep the NAT binding in the router active even
if
> there is no activity from the phone. NAT ping from ser (either
rtpproxy or
> mediaproxy) tries to ping the phone with an empty SIP packet. However
this
> inbound UDP packet can't always keep the NAT binding active because
some NAT
> firewalls ONLY refresh the timer based on outbound packets. So the
result is
> that the binding expires after a certain time even if NAT ping is
enabled.
>
> For example, Dlink falls in this category. It appears the timeout is 3
> minutes and NAT ping won't make it active.
>
> If anyone has a good experience with any consumer router, can you
please let
> share with us?

Use an UA that supports it (Sipura or Cisco for example).

Saludos
JesusR.

-------------------------------
Jesus Rodriguez
VozTelecom Sistemas, S.L.
jesusr at voztele.com
http://www.voztele.com
Tel. 902360305
-------------------------------

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