Re: DNS qureries cause ISA alerts
- From: "Jim Harrison" <jim@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 7 Jan 2003 16:24:52 -0800
Probably not.
This is very common when DNS query responses are "late", as far as ISA is
concerned.
Since ISA has "timed out" the DNS query, the response is seen as a port
scan.
Generally, you can ignore this, but if it happens consistently, you may want
to consider using different external DNS servers.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/pages/author_index.asp?aut=3
http://isatools.org
Read the help / books / articles!
----- Original Message -----
From: "Farshad Farooji" <farshad@xxxxxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Tuesday, January 07, 2003 08:29
Subject: [isalist] DNS qureries cause ISA alerts
http://www.ISAserver.org
Hi everyone;
I posted this message yesterday, unfortuantely got no answers. since it is
getting to be a serious problem for me I am doing it again.
I have been receiving ISA alerts as all port scans and so on very
frequently and it is very anoying. now I have found out that these alerts
are caused by DNS queries thru ISA. my clients are mainly webproxy and
securenat. is there anything wrong with my settings on the ISA?
thanks for the help,
Farshad
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