RE: Mail blocked from an entire company?
- From: "Thomas W Shinder" <tshinder@xxxxxxxxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 12 Jun 2003 18:55:03 -0500
Hi Brian,
How did you create a packet filter to allow inbound access to a LAT
host?
Thanks!
Tom
Thomas W Shinder
www.isaserver.org/shinder
ISA Server and Beyond: http://tinyurl.com/1jq1
Configuring ISA Server: http://tinyurl.com/1llp
-----Original Message-----
From: Rogers, Brian [mailto:RogersB@xxxxxxxxxxxxxx]
Sent: Thursday, June 12, 2003 9:53 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] Mail blocked from an entire company?
http://www.ISAserver.org
Recently we received a call from one of our customers
complaining that all email from that customer was not being received.
After a bit of troubleshooting, we discovered in the logs that all
packets were being dropped from that customers mail server by the
firewall service.
Now we have a mail publishing rule that has been working fine
for over a year...we send and receive email just fine over the internet
with that published Exchange 5.5 bridgehead. Why on earth would it
single out one particular mail server to drop all packets from? The
only solution we could come up with was to create a packet filter to
specifically allow traffic from that remote IP...to the published IP on
the ISA server and everything worked fine.
I had verified the mail publishing rule, verified there are no
other packet filters configured to deny traffic like this...I simply
cant figure out what went wrong here. I can see no configuration
changes from when it was working fine..till now.
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