iptables with recent

/etc/sysconfig/iptables

# REDHAT EL 5.5
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [9871333:195343406743]
:LIMIT_SSH - [0:0]
:RH-Firewall-1-INPUT - [0:0]
-A INPUT -j RH-Firewall-1-INPUT
-A FORWARD -j RH-Firewall-1-INPUT
-A LIMIT_SSH -m recent --set --name SSH --rsource
-A LIMIT_SSH -m recent --update --seconds 60 --hitcount 4 --name SSH --rsource -j DROP
-A LIMIT_SSH -j ACCEPT
-A RH-Firewall-1-INPUT -i lo -j ACCEPT
-A RH-Firewall-1-INPUT -p icmp -m icmp --icmp-type any -j ACCEPT
-A RH-Firewall-1-INPUT -p esp -j ACCEPT
-A RH-Firewall-1-INPUT -p ah -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j LIMIT_SSH
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
COMMIT