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Date: Tue, 30 Sep 2008 10:16:37 +0200
From: Ollivier Robert <roberto@keltia.freenix.fr>
To: freebsd-hackers@freebsd.org
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Subject: Re: SSH Brute Force attempts
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According to Henrik Hudson:
> Yeap, -security
> 
> However, also try this in pf.conf (specific rules related to this; you'll need 
> more for a real pf.conf):
> 
> table <badguys> { } persist
> block in quick from <badguys>
> pass in on $ext_if proto tcp from any to ($ext_if) port ssh keep state 
> (max-src-conn 5, max-src-conn-rate 4/300, overload <badguys> flush global)

That one is very effective.
-- 
Ollivier ROBERT -=- FreeBSD: The Power to Serve! -=- roberto@keltia.freenix.fr
Darwin sidhe.keltia.net Version 9.4.0: Mon Jun  9 19:30:53 PDT 2008; i386