full-disclosure - Re: Brute force attack

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Date: Tue, 12 Feb 2008 12:15:54 -0500
From: Valdis.Kletnieks@...edu
To: Abilash Praveen <contactme@...lashpraveen.com>
Cc: "A.L.M.Buxey@...ro.ac.uk" <A.L.M.Buxey@...ro.ac.uk>,
	full-disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: Brute force attack - need your advice

On Tue, 12 Feb 2008 17:38:07 +0530, Abilash Praveen said:
> Ok - I may not be able to lock in the SSH to a particular IP, but can
> ofcourse try port-knocker and a non-password-based SSH. I will research a
> bit about these as i'm not very familiar with a port-knocker and a
> non-password-based SSH yet.

Here's a nice iptables-based port knocker for SSH (or any other service for
that matter):

http://www.debian-administration.org/articles/268

Or you can use knockd:

http://www.zeroflux.org/cgi-bin/cvstrac.cgi/knock/wiki

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