iptables and ssh

[LC]

> Hi,
>
> LC schrieb:
>> Hi,
>>
>> How do write the code for iptables to drop IP(s) trying to access ssh 
>> after 3 tries and block it for 10mins?
>>
>> regards
>
> sth like this?
> this is from my iptables script, you have to adjust the variables.
>
> $ipt -A INPUT -m state --state NEW -p tcp --dport 22 -m recent --name 
> SSH --update --seconds 60 --hitcount 4 -j LOG_DROP
>
> $ipt -A INPUT -m state --state NEW -p tcp --dport 22 -m recent --name 
> SSH --set
>

My exisiting script is created by webmin, it is as follows. How do i include 
the above to this exisiting one?

# Firewall configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
*filter
:FORWARD ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:RH-Firewall-1-INPUT - [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -j RH-Firewall-1-INPUT
-A FORWARD -j RH-Firewall-1-INPUT
-A RH-Firewall-1-INPUT -i lo -j ACCEPT
-A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT
-A RH-Firewall-1-INPUT -p 50 -j ACCEPT
-A RH-Firewall-1-INPUT -p 51 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -d 224.0.0.251 --dport 5353 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state -m tcp --dport 21 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state -m tcp --dport 22 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state -m tcp --dport 25 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 53 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --sport 53 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state -m tcp --dport 80 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 110 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 443 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 993 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 995 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 1012 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 1500 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 6277 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --sport 6277 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 4455 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 5100 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6000 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6001 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6002 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6003 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6004 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6005 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6006 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6007 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6008 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6009 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6010 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6969 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 8000 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 8001 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 8080 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 20000 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6666 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6667 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 6668 --state NEW -j 
ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Generated by webmin
*mangle
:FORWARD ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:PREROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
COMMIT
# Completed
# Generated by webmin
*nat
:PREROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
COMMIT
# Completed