Mario,
Something to check is your DNS settings on the Exchange server and whether
your Exchange server is permitted to make DNS queries through the firewall.
There are instances where Exchange will wait to get a DNS response before
sending a message out. If Exchange has to wait for the DNS requests to time
out, that can slow down the sending (and probably receiving).
Steve Schuster, CCSE, CCNA
Midwest ISO
Security Analyst
-----Original Message-----
From: M�rio" Behring [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, December 12, 2000 10:36 AM
To: Firewall-1 List; Security Basics
Subject: [FW1] Emails slow to leave
Hi all.
I have a mailserver (Exchange) running in the internal
network behind a FW-1 running on NT 4. The static
working Ok and the emails are getting in and out.
Routes and arp statements are configured Ok on the
firewall server.
The problem is that the messages are taking a lot of
time to leave the Exchange server. The queue fills
fast and the emails take a lifetime to leave it. Is
there any possibility of the FW-1 be the one to blame
on this? The web browsing (using dynamic NAT) with no
performance problems.
I know this may be simple for the most of you guys,
but help would be appreciated.
Thank you.
M�rio
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