Ok.. looked at my other rules and came up with this instead.. but it still complains: iptables -A INPUT -i eth0 -p tcp --destination-port 22 \ --limit 6/hour --limit-burst 2 iptables v1.2.6a: Unknown arg `--limit' Try `iptables -h' or 'iptables --help' for more information. Help would be much appreciated :] <EOL> Tib On Tue, 25 Jan 2005, Tib wrote: > > I'd like to use the --limit and --limit-burst options to protect my sshd > from dictionary password attacks. Considering the userbase and activity > level I'd say that something like this would suit me just fine. > > --limit 6/hour > --limit-burst 2 > > This would limit it to two connect/login attempts at first, and then one > more every 10 minutes.. correct? > > Would this be the proper command to use? I'm trying to just limit > connections from the outside world, not from the local network, hence the > address as a destination: > > iptables -A INPUT --d 66.80.174.210 --dport 22 \ > --limit 6/hour --limit-burst 2 > > > <EOL> > Tib >