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Re: netcraft && uptime guesses

To: Scott Roy Atwood <atwood@cs.stanford.edu>
Subject: Re: netcraft && uptime guesses
From: Magnus Bodin <magnus@bodin.org>
Date: Thu, 21 Dec 2000 16:26:17 +0100
Cc: Alex de Joode <usura@zedz.net>, misc@openbsd.org
Content-Disposition: inline
References: <20001220162632.A16093@outpost.zedz.net> <20001221065841.A27771@orion.scot.to>
User-Agent: Mutt/1.2.5i

On Thu, Dec 21, 2000 at 06:58:41AM -0800, Scott Roy Atwood wrote:
> * Alex de Joode <usura@zedz.net> [001220 16:19]:
> > It seems that netcraft now also includes a uptime guess.
> [snip]
> > Any ideas how to disable this remote uptime guessing ?
> 
> Try "sysctl -w net.inet.tcp.rfc1323=0".  This should disable the RFC1323
> TCP extensions, which includes timestamping.

Please also see /etc/sysctl.conf

Uncomment the rfc1323-line to make this setting done at boot through /etc/rc

/magnus

--
http://x42.com/

References:
- netcraft && uptime guesses
  - From: Alex de Joode <usura@zedz.net>
- Re: netcraft && uptime guesses
  - From: Scott Roy Atwood <atwood@cs.stanford.edu>

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