RE: ISA Server DNS Caching
- From: "Young, Gerald G" <Gerald.Young@xxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 19 Jan 2006 11:51:07 -0600
Wonderful. *8^)
ISA Server 2004 Enterprise Edition.
Cordially yours,
Jerry G. Young II
MCSE (4.0/W2K)
Atlanta EES Implementation Team Lead
HHS Engineering
Unisys
11493 Sunset Hills Rd.
Reston, VA 20190
Office: 703-579-2727
Cell: 703-625-1468
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-----Original Message-----
From: Jim Harrison [mailto:Jim@xxxxxxxxxxxx]
Sent: Thursday, January 19, 2006 12:44 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: ISA Server DNS Caching
http://www.ISAserver.org
ISA - what; 2000 or 2004?
Their NDS behaviors are quite different.
-------------------------------------------------------
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/Jim_Harrison/
http://isatools.org
Read the help / books / articles!
-------------------------------------------------------
-----Original Message-----
From: Young, Gerald G [mailto:Gerald.Young@xxxxxxxxxx]
Sent: Thursday, January 19, 2006 09:34
To: [ISAserver.org Discussion List]
Subject: [isalist] ISA Server DNS Caching
http://www.ISAserver.org
I'm trying to get a better understanding of how the ISA Server deals
with DNS queries and caching.
From what I've been able to discern, ISA Server will not use the local
hosts file on the system (this configurable?) and instead grabs the
record from the DNS server. However, changes made to the DNS server
that propagate out, and are then returning the updated record through
NSLOOKUP on the box for all DNS servers configured in the TCP/IP stack
do not take immediately. The ISA logs still show the old IP address
being used. Executing ipconfig /flushdns doesn't work, either. After
about 15 minutes or so, ISA starts using the new DNS record.
This indicates that caching is going on someplace but I haven't been
able to find any additional information on how or where ISA caches DNS
records, nor can I find out how to clear that cache? Service restart,
perhaps?
Any insight will be greatly appreciated.
Cordially yours,
Jerry G. Young II
MCSE (4.0/W2K)
Atlanta EES Implementation Team Lead
HHS Engineering
Unisys
11493 Sunset Hills Rd.
Reston, VA 20190
Office: 703-579-2727
Cell: 703-625-1468
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
MATERIAL and is thus for use only by the intended recipient. If you
received this in error, please contact the sender and delete the e-mail
and its attachments from all computers.
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