Re: Blocked ICMP, 3, 3 ?
- From: "Jim Harrison" <jim@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Wed, 17 Dec 2003 13:27:31 -0800
This should help:
http://www.iana.org/assignments/icmp-parameters
Basically, these are either:
1. responses from 67.127.120.169 to your ISA essentially stating that the
UDP port you tried to connect to was not available on that host
2. a spoof
Without seeing any other traffic that you might or might not have sent to
that host, it's difficult to say which, but my money is on a spoof.
If you see a lot of these, you should review your logs to see if you really
are trying to contact that host using UDP or if it's unwelcome traffic.
If it's unwelcome, then unless he's slamming you with ICML, you can ignore
it; ISA did.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://www.microsoft.com/isaserver
http://isaserver.org/Jim_Harrison
http://isatools.org
Read the help, books and articles!
----- Original Message -----
From: "Robert" <rzeff@xxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Wednesday, December 17, 2003 12:49
Subject: [isalist] Blocked ICMP, 3, 3 ?
http://www.ISAserver.org
Could some kind sole explain what this means?
Do I need to add a protocol rule?
adsl-67-127-120-169.dsl.sktn01.pacbell.net
12/17/2003, 8:19:33, 67.127.120.169, <My IP>, ICMP, 3, 3, -, BLOCKED, ...
It is from the Packet Filter log.
Servers running behind ISA are web, email, nntp, ftp, & dns.
Also, after using my log scanner for a bit, I deemed it not all that
useful. I have updated it and hope some find it useful:
http://nikola.com/freebies.htm
Regards,
-
Robert
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