RE: How I spent my Christmas vacation
- From: "Ball, Dan" <DBall@xxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 3 Jan 2006 12:58:19 -0500
That does lead me down another avenue of investigation... My number of
NDRs isn't exceedingly high, and there isn't all that much in the SMTP
queue. I'm wondering about Amy's mention that her problem was due to an
upstream DNS server. Is there any other way than the Firewall Logs to
see how much DNS traffic is passing through the ISA server?
________________________________
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx]
Sent: Tuesday, January 03, 2006 12:48 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: How I spent my Christmas vacation
http://www.ISAserver.org
Hi Amy,
You bet! The DNS stuff can drive you crazy. That's one nice thing about
the Exchange SMTP service, that you can disable NDRs. You can't do that
with the IIS SMTP service. I'm hoping that the Longhorn IIS SMTP service
will allow for the same functionality.
Thomas W Shinder, M.D.
Site: www.isaserver.org <http://www.isaserver.org/>
Blog: http://spaces.msn.com/members/drisa/
Book: http://tinyurl.com/3xqb7 <http://tinyurl.com/3xqb7>
MVP -- ISA Firewalls
**Who is John Galt?**
________________________________
From: Amy Babinchak [mailto:amy@xxxxxxxxxxxxxxxxxxxxxxxxxx]
Sent: Tuesday, January 03, 2006 11:41 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: How I spent my Christmas vacation
http://www.ISAserver.org
I agree. Most of the ISA problems can be explained by poor DNS
and/or IIS configuration. I spent some of my "holiday" chasing down DNS
issues for 2 clients. In both cases it turned out that the ISP DNS was
sluggish and was causing email problems for my clients. Exchange wasn't
able to use the smart host with any efficiency. Messy stuff trying to
explain smart hosts and DNS resolution in plain english. Maybe I should
forward the article on to the ISP's! If only their staff could read.
I've had to turn off NDR for two servers. I hated to do it but
the queues of NDR's in Exchange were just beyond reason. You wouldn't
believe the amount of junk mail that Travel Agencies and Real Estate
firms receive.
Amy
Harbor Computer Services
Small Business Computer Specialists
Client Blog: http://smalltechnotes.blogspot.com/
Tech Blog: http://isainsbs.blogspot.com/
Website: http://www.harborcomputerservices.net/
________________________________
From: Ball, Dan [mailto:DBall@xxxxxxxxxxx]
Sent: Tuesday, January 03, 2006 12:26 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: How I spent my Christmas vacation
http://www.ISAserver.org
Good article Tom! Gave me another thing to check next time
things turn sluggish!
________________________________
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx]
Sent: Tuesday, January 03, 2006 11:39 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] How I spent my Christmas vacation
http://www.ISAserver.org
Here's an interesting story on Internet performance issues:
http://spaces.msn.com/members/drisa/Blog/cns!1p9yz6owxXl-uIlyqIZXkCrg!39
0.entry
<http://spaces.msn.com/members/drisa/Blog/cns!1p9yz6owxXl-uIlyqIZXkCrg!3
90.entry>
Thomas W Shinder, M.D.
Site: www.isaserver.org <http://www.isaserver.org/>
Blog: http://spaces.msn.com/members/drisa/
Book: <http://tinyurl.com/3xqb7> http://tinyurl.com/3xqb7
MVP -- ISA Firewalls
**Who is John Galt?**
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