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Date: Sat, 18 Mar 2006 12:35:28 -0800
From: Chris Maness <chris@chrismaness.com>
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To: Wes Santee <wsantee@gmail.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: How to Stop Bruit Force ssh Attempts?
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Wes Santee wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> Chris Maness wrote:
>   
>> In my auth log I see alot of bruit force attempts to login via ssh.  Is
>> there a way I can have the box automatically kill any tcp/ip
>> connectivity to hosts that try and fail a given number of times?  Is
>> there a port or something that I can install to give this kind of
>> protection.  I'm still kind of a FreeBSD newbie.
>>     
>
> security/bruteforeceblocker (requires pf as the firewall)
>
> security/denyhosts (uses tcp_wrappers and /etc/hosts.allow)
>
> security/sshit (requires ipfw as firewall)
>
> I rolled my own solution and haven't used any of these, so I don't know
> how well they work in practice.  They probably all require some initial
> setup and configuration.
>
> Cheers,
> - -Wes
>
>   
Thanks, I played with all three. Denyhosts is the best hands down.