RE: DNS Restart After ISA Server Reboot
- From: "Mark Hopkins" <Mark.Hopkins@xxxxxxxxxxxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 14 Aug 2003 09:44:54 -0500
Troy,
Amazing! This has been a problem (or is it a feature?) for as long as I
can remember. Way before ISA 2000 SP1. I was hoping that it would have
been addressed in that SP. In my opinion it is VERY serious. Perhaps M$
had better things to do, like develop yet another new product to sell
us. :-)
Yes, I would be very interested in seeing your script. Could you send it
to me at mark.hopkins@xxxxxxxxxxxxxxxxxxxxx? Thanks very much.
Mark
________________________________
From: Troy Robbins [mailto:trobbins@xxxxxxxxxxxxx]
Sent: Thursday, August 14, 2003 1:10 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: DNS Restart After ISA Server Reboot
http://www.ISAserver.org
Mark,
We encountered a similar problem under the following conditions:
- upon reboot of the ISA server
- restart of the ISA services
- external DNS failure from our ISP
After spending time attempting to troubleshoot any issue that was going
on with DNS or ISA, the workaround I came up with was to create a script
that polls an external FQDN with more than one DNS server, the script
then parses the results and counts the DNS servers returned, if the
result is not what was expected the script restarts the local DNS
service (logs an event) and rechecks the results again. If the script
returned bad results the 2nd pass through a notification event is fired
off as well (i.e. email, MS Messenger Service, log file and event log).
The script keeps a tally of the total failures and will stop after the
3rd attempted restart of the DNS service - notifying us that human
intervention is required. We use the script on all of our internal DNS
servers (5) and its executed every 4 minutes. On average the DNS service
is restarted a couple times every other day, very seldom have we had to
intervene - only when perhaps our external DNS servers were having
issues.
While this obviously doesn't resolve the underlying problem, it's
certainly placed a Band-Aid on the issue and allowed us to move on for
the time being. If you like I can email the script to you off list.
Troy Robbins, CISSP
----- Original Message -----
From: Mark Hopkins <mailto:Mark.Hopkins@xxxxxxxxxxxxxxxxxxxxx>
To: [ISAserver.org Discussion List]
<mailto:isalist@xxxxxxxxxxxxx>
Sent: Thursday, August 14, 2003 12:28 AM
Subject: [isalist] RE: DNS Restart After ISA Server Reboot
http://www.ISAserver.org
I never said that DNS stops. I merely stated that I must
"restart" DNS (sometimes) after either restarting ISA services or
rebooting the ISA Server server. At present, my setup is as follows:
(1) DNS Server on PDC (Active Directory/Windows 2000 Server)
(2) ISA Server (member server/Windows 2003 Standard)
Integrated Mode, but not array.
It seems fairly simple. DNS does not stop internally, but only
when attempting to resolve a FQDN outside of the internal network.
Thanks for your help John.
Mark
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