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Date: Sat, 18 Sep 2004 15:07:34 -0500 (CDT)
From: Mike Silbersack <silby@silby.com>
To: "Danil V.Gerun" <news@625.ru>
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cc: freebsd-security@freebsd.org
Subject: Re: Random source ports in FreeBSD?
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On Sat, 18 Sep 2004, Danil V.Gerun wrote:

> So, as far as I got to know, randomizing source ports in FreeBSD is
> impossible now? (to be exact - is not implemented?)
>
> It's very interesting to me - WHY is it so?
> I mean - may be there are good reasons for not making all this?..

Source port randomization was implemented before 4.10 was released.  See 
in_pcb.c revisions 1.143 - 1.146, 1.59.2.27, or 1.59.2.27.2.1, depending 
on the branch you're interested in:

http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet/in_pcb.c

> I don't have opportunity to test the FreeBSD 5 patch, but I tried to
> analyze the patching results attentively (what I worry about - is
> using the arc4random() function in FreeBSD 5...).

What are your concerns with the way port randomization was implemented in 
FreeBSD?

Mike "Silby" Silbersack