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Date:      Tue, 02 Apr 2002 21:42:25 -0600
From:      Christopher Schulte <schulte+freebsd@nospam.schulte.org>
To:        "Marc G. Fournier" <scrappy@hub.org>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Netcraft survey ... what ports?
Message-ID:  <5.1.0.14.0.20020402213456.037854f8@pop3s.schulte.org>
In-Reply-To: <20020402232731.Y2337-100000@mail1.hub.org>
References:  <5.1.0.14.0.20020402210936.02b8edf8@pop3s.schulte.org>

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At 11:31 PM 4/2/2002 -0400, Marc G. Fournier wrote:

># sysctl net.inet.tcp.rfc1323=1
>net.inet.tcp.rfc1323: 1 -> 1

Looks good.

>4.5-STABLE FreeBSD 4.5-STABLE #6: Mon Mar 25 21:01:05 CST 2002

I don't have any -STABLE boxes these days, but I do have

4.5-RELEASE-p2 #0: Sat Mar  9 07:08:14 CST 2002

And netcraft detects this OS and uptime (with tcp extensions enabled) just 
fine.

>Any idea on how it detects the OS?  Righ tnow, I have all ports in
>inetd.conf disabled, which I believe is the default with FreeBSD now ...
>do some of those have to be open'd for the detection to work?  Would be a
>shame for 'FreeBSD usage' to drop in netcraft stats as ppl upgrade to the
>more recent versions :(

The only port you'd need open is port 80, so netcraft can first query your 
webserver.  It uses those TCP/IP packets to determine OS and uptime.

http://uptime.netcraft.com/up/accuracy.html#os

--
Christopher Schulte
http://www.schulte.org/
Do not un-munge my @nospam.schulte.org
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