RE: ISA Server DNS Caching
- From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 19 Jan 2006 13:26:28 -0600
Blocking malicious traffic :)
Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://spaces.msn.com/members/drisa/
Book: http://tinyurl.com/3xqb7
MVP -- ISA Firewalls
**Who is John Galt?**
> -----Original Message-----
> From: Jim Harrison [mailto:Jim@xxxxxxxxxxxx]
> Sent: Thursday, January 19, 2006 1:16 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: ISA Server DNS Caching
>
> http://www.ISAserver.org
>
> ..of course.
> Install ISA in an NDS environment and it blocks everything...
>
>
> -------------------------------------------------------
> Jim Harrison
> MCP(NT4, W2K), A+, Network+, PCG
> http://isaserver.org/Jim_Harrison/
> http://isatools.org
> Read the help / books / articles!
> -------------------------------------------------------
>
>
> -----Original Message-----
> From: Thor (Hammer of God) [mailto:thor@xxxxxxxxxxxxxxx]
> Sent: Thursday, January 19, 2006 11:02
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: ISA Server DNS Caching
>
> http://www.ISAserver.org
>
> NDS behaviors? You integrate with Novell now?
>
> t
>
> -----
> "I'll see your Llama and up you a Badger."
> John T
>
>
>
> ----- Original Message -----
> From: "Jim Harrison" <Jim@xxxxxxxxxxxx>
> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
> Sent: Thursday, January 19, 2006 9:44 AM
> 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
>
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>
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