Subject: Re: random ip_id must be configurable
To: David Laight <>
From: Thor Lancelot Simon <>
List: tech-net
Date: 09/13/2003 00:59:41
On Sat, Sep 13, 2003 at 12:32:18AM +0100, David Laight wrote:
> > 
> > 	based on nmap OS fingerprint database, freebsd randomizes ip_id.
> > 	also you see even quite a few embedded products (like small broadband
> > 	router) randomizes ip_id.  why we can't do it for netbsd.
> Do they randomize them? or just count in odd fashion?
> I don't actually know the tests that nmap is doing, but 'count XOR 0xaaaa'
> would (probably) show up as random.

For what it's worth, nmap used to think that lots of things about NetBSD
were "random" where we simply counted in a way that nmap didn't know about.