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Date: Mon, 14 Mar 2005 08:04:30 -0500
From: Kyle Jensen <kljgroups@gmail.com>
To: freebsd-questions@freebsd.org
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Subject: Cutting down on ssh breakin attempts
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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