[FW-1] Exchange doesn't send e-mail notification through firewall

[Nico De Ranter <nico@FW1-NOSPAMSONYCOM.COM>]

Howdy,

I moved a number of PC's to a protected network (FW-1 NG.FP1). The PC's
on the protected network are allowed to access anything outside their network
but nothing is allowed in. Unfortunately the users need to have
access to the local virus factory, euh I mean Exchange server. This is still
possible since they are allowed to access anything outside their network,
however it turns out the Exchange server sends a UDP packet whenever the
user gets a new mail. So now the users don't get an automatic warning
anymore but instead they need to press 'check mail' every once in a while.
Unfortunately the Exchange server does not seem to use a fixed port
for sending those packets so I can't just allow that specific traffic.
Is there any way to get around this so the users get their notifications
again?

Nico

---------------------------------------------------------
 "It has been said that there are only two businesses that
  refer to customers as users: illegal drug trade and
               the computer industry."
---------------------------------------------------------
Nico De Ranter
Sony Service Center (SDCE/VPE-B)
Sint Stevens Woluwestraat 55 (Rue de Woluwe-Saint-Etienne)
1130 Brussel (Bruxelles), Belgium, Europe, Earth
Telephone: +32 2 724 86 41 Telefax: +32 2 726 26 86
e-mail: nico.deranter@sonycom.com

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