[CentOS] iptables rules

[Barry Brimer]

> I have 2 CentOS servers 82.201.195.123 & 62.139.61.84
> I want to deny all ssh logins on port 22 on (62.139.61.84) from any host 
> except from (82.201.195.123)
>
>
> Can anybody tell me such iptables rules to write in /etc/sysconfig/iptables
> Currently, im using the following rules (on 62.139.61.84)
>
> *filter
> :INPUT ACCEPT [0:0]
> :FORWARD ACCEPT [0:0]
> :OUTPUT ACCEPT [0:0]
> :RH-Firewall-1-INPUT - [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 -i eth1 -j ACCEPT
> -A RH-Firewall-1-INPUT -i eth0 -s 82.201.195.123 -j ACCEPT
> -A RH-Firewall-1-INPUT -m tcp -p tcp --dport 22 -j REJECT
> -A RH-Firewall-1-INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT
> -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
> -A RH-Firewall-1-INPUT -i eth0 -j ACCEPT
> -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
> COMMIT

iptables is a first-match wins firewall.  The rule above that mentions the 
82.201.195.123 will accept all traffic from that IP address.  The rule 
below it seems a little vague.  I might change that to:

-A RH-Firewall-1-INPUT -m tcp -p tcp -i eth0 -d 62.139.61.84 --dport 22 -j 
REJECT

Hope this helps.

Barry