Quoting Chris Tobkin <[EMAIL PROTECTED]>:

What kind of VoIP phone are you using?

I am using a Snom 300 phone

Thanks
luis



// Chris

-----Original Message-----
From: Mailing list for discussion of Firewall-1
[mailto:[EMAIL PROTECTED] On Behalf Of alois
blasbichler
Sent: Monday, November 19, 2007 3:53 AM
To: [email protected]
Subject: [FW-1] voip-telefon behind 2 Firewalls

Hello  list

We have the problem, that a voip-telefon does not work.
The problem seems : The voip-telefon does not register to the
voip-provider.
The voip-telefon is behind 2 firewalls, our checkpoint firewall  and a
Cisco-Pix-Firewall from our provider.

The strange is: with only our Checkpoint the voip-telefon works fine,
with only the Cisco-Pix-Firewall the voip-telefon works fine. Seems that
the combination of the 2 Firewalls is the problem.

We have tried a lot of things, with NAT, without NAT, with a
VOIP-DoMain, without ...
We have installed  NGX R65 - our Checkpoint is a Cluster (Load
Balancing).
There is no way ....

Maybe somebody have a silimar topology wroking o can give me some help.

Thank you very much in advanced
luis


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--
dr. Alois Blasbichler
Informatikabteilung - ripartizione informatica
Sanitätsbetrieb Brixen - Azienda Sanitaria di Bressanone
Dantestr. 53 39042 Brixen - Via Dante 53 39042 Bressanone
tel. 0472/812087
mailto:[EMAIL PROTECTED]
http://www.sb-brixen.it

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