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Network Security Firewalls
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ICMP timestamps (Re: Wierd ICMP in logs)

Subject: ICMP timestamps (Re: Wierd ICMP in logs)
Date: Wed, 15 Sep 2004 11:29:44 +0200
On Tue, Sep 14, 2004 at 02:23:32AM -0400, GSimmonds wrote:

http://www.networkmagazine.com/article/NMG20000829S0003

  "Getting a response to a Timestamp Request not only tells you that
   a system is up but also that it is not running a Microsoft
   operating system."

This is not true. I have several Windows systems around me within our
company and they all answers to ICMP Timestamp Request. Actually, you
can differentiate some stacks when you inspect the timestamp replies.

See ICMPinfo.c from http://aluigi.altervista.org/mytoolz.htm

Martin Mačok
IT Security Consultant

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