ISA Server loses FW connection to mail server
- From: "Brad Alpert" <BAlpert@xxxxxxxxxxxxxxxx>
- To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
- Date: Sat, 26 Oct 2002 16:55:59 -0500
W2k/SP2, ISA/SP1 running in integrated mode.
I'm on dialup with dedicated IP, public web and email presence, and have
a mail server inside the network that points to ISA as a firewall client
(secure NAT). The ISA server will terminate the firewall session with
this machine after a telephone disconnect and re-dial (happens
frequently, but that's the breaks out here in rural America where there
is no broadband alternative.) Sometimes the session will reactivate
itself, but not very often. The intermittancy makes it tough to debug.
When the firewall session is working, email flows great. When the
session drops, no email. The way I check on the presense of the
connection is under Monitoring/Sessions in the ISA MMC, where it shows
Session Type (Firewall Session), User Name (blank), Client Computer
(mail server's internal IP), Client Address (mail server's internal IP),
and Activation (date/time of connection startup). When the connection
is gone, there is no such entry.
This occurred with Exchange 2000 as the mail server and I couldn't fix
the problem. I switched the email services to a linux machine running
sendmail and the problem occurs less frequently, but it occurs enough
that my email delivery isn't reliable.
I know how to monitor services and get them restarted as necessary, but
I don't know what I can do to monitor for the presence of a firewall
connection. It isn't a service, so what the heck do I look for? You
could do this in *nix with a chron or other script, but I don't know how
to do it in the Windows world.
I desperately need to get this solved and would appreciate any help
anyone might have.
Thank you.
Brad Alpert
MCSE/NT4 & W2k
Compaq MASE
Expert marksman and a darned good cook
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