your favourite method of dealing with ssh brute force attacks

[Eric Sandeen]

Michał Piotrowski wrote:
> Hi,
> 
> I recetly had 30 hours of ssh brute force attack on my system. I'm
> using strong passwords, but still can be geneated from /dev/random, so
> I switched to rsa authentication. What's your favourite way to deal
> with such attacks? Please describe pros and cons.
> 
> Regards,
> Michal

Aside from not allowing password logins, I throttle them, they usually
get tired and go away to an easier target.

-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -m limit --limit 1/minute --limit-burst 2 -j ACCEPT


-Eric