How to set up an iptable rule?

[Vinicius]

Vinicius escreveu:
> Hello,
> 
> I would like to have a rule to reject an out-of-range IP's to access a 
> specified port on my system, so I did the following rule:
> "iptables -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp 
> --dport 22 -m iprange ! --src-range 200.252.X.X-200.252.X.Y -j REJECT 
> --reject-with icmp-host-prohibited", where X and Y are appropiate numbers.
> 
> Does the above rule correct, please?
> 
> TIA,
> Vinicius.
> 

If the above rule number is 4 and the following rule number is 3, then 
is the rulenum 4 useless, please?
rule number 3: "iptables -A RH-Firewall-1-INPUT -m state --state NEW -m 
tcp -p tcp --dport 22 -j ACCEPT"

TIA,
Vinicius.