Re: ssh howto for debian?

[Paul Cartwright <ale@pcartwright.com>]

On Wed January 28 2009, Kevin Philp wrote:
> Even easier and better add the following to your iptables firewall. This
> monitors your connections to the ssh port and drops the connection if
> they try more than 4 connections in 10 minutes. I have been using this
> for a while - works a treat.
>
> references at :
>
> http://www.la-samhna.de/library/brutessh.html
> http://www.ducea.com/2006/06/28/using-iptables-to-block-brute-force-attacks
>/
>
> /sbin/iptables -A ssh-connection -i $EXT -p tcp --dport 22 -m recent
> --update --seconds 600 --hitcount 4 --rttl --name SSH -j LOG
> --log-prefix "SSH_brute_force "

# /sbin/iptables -A ssh-connection -i $EXT -p tcp --dport 22 -m 
recent  --update --seconds 600 --hitcount 4 --rttl --name SSH -j 
LOG --log-prefix "SSH_brute_force "
Bad argument `tcp'
Try `iptables -h' or 'iptables --help' for more information.


-- 
Paul Cartwright
Registered Linux user # 367800
Registered Ubuntu User #12459