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References: <5.1.0.14.0.20020402210936.02b8edf8@pop3s.schulte.org> <5.1.0.14.0.20020402213456.037854f8@pop3s.schulte.org>
Subject: Re: Netcraft survey ... what ports?
Date: Tue, 2 Apr 2002 22:24:51 -0600
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In case you have not seen this, here is Netcraft's explanation of how they
come up with their info
http://uptime.netcraft.com/up/accuracy.html
If you want to see your HTTP headers from a third party off site box, go
here
http://www.network-tools.com


----- Original Message -----
From: "Christopher Schulte" <schulte+freebsd@nospam.schulte.org>
To: "Marc G. Fournier" <scrappy@hub.org>
Cc: <freebsd-questions@freebsd.org>
Sent: Tuesday, April 02, 2002 9:42 PM
Subject: Re: Netcraft survey ... what ports?


> 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
> email address.  This address is valid.
>
>
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