Date: Sat, 02 Oct 2010 20:03:08 -0700 From: Julian Elischer <julian@freebsd.org> To: Andre Oppermann <andre@freebsd.org> Cc: Jordi Espasa Clofent <jespasac@minibofh.org>, freebsd-net@freebsd.org Subject: Re: TCP Message-ID: <4CA7F26C.7030408@freebsd.org> In-Reply-To: <4CA7A103.3050000@freebsd.org> References: <4CA6FF9A.9090502@minibofh.org> <4CA7A103.3050000@freebsd.org>
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On 10/2/10 2:15 PM, Andre Oppermann wrote: > On 02.10.2010 11:47, Jordi Espasa Clofent wrote: >> Hi all, >> >> I've read this interesting article: >> http://www.packetstan.com/2010/09/openbsd-timestamps.html >> >> The question is simple >> >> żIs there some way in FreeBSD to randomize the TCP timestamps as >> OpenBSD does by default? I guess >> some sysctl statement should do it, but I don't know. > > The timestamps on FreeBSD for passive open are randomized as > long as you use SYN cookies (enabled by default). For passive > open they are not (yet) randomized. which one of those 'passive' is supposed to be 'active'?
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