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From: Josh Paetzel <josh@tcbug.org>
To: freebsd-questions@freebsd.org, Kyle Jensen <kljgroups@gmail.com>
Date: Mon, 14 Mar 2005 23:28:03 -0600
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Subject: Re: Cutting down on ssh breakin attempts
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On Monday 14 March 2005 07:04, Kyle Jensen wrote:
> Hi,
>
> I run a webmail server for a small company, which
> is (of course) running FreeBSD 5-stable.  I get about
> 50-100 failed loging attempts via ssh on a daily basis.
>
> Occasionally, these show up in my daily security digest
> with messages like:
>
> reverse mapping checking getaddrinfo for h169-210-68-8.a
> dcast.com.tw failed - POSSIBLE BREAKIN ATTEMPT!
>
> But mostly it's stuff like
>
> Illegal user postgres from 210.68.8.169
>
> What's the best way to cut down on these attempts?
> I thought about adding a blacklist to my pf.conf rules
> for the pf firewall.
>
> Any thoughts would be greatly appreciated!
> Kyle

Maybe this is an obvious question, but do you need world access to 
ssh?

-- 
Thanks,

Josh Paetzel