How to set up an iptable rule?

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To: fedora-list@xxxxxxxxxx
Subject: How to set up an iptable rule?
From: Vinicius <cviniciusm@xxxxxxxxxxxx>
Date: Sun, 09 Jan 2005 23:17:55 -0200
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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.

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