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Re:what about ports?

Posted by: Administrator on December 31, 2005 11:08 AM
Yes that be done quite easily. Instead of monitoring an entire range or an individual IP address, you can narrow that down even further by specifying ports or port-ranges.

As a (simple) example, a rule like this one:

<tt>iptables -A town-a -s 192.168.1.10</tt>


could become:

<tt>iptables -A town-a -s 192.168.1.10 -p tcp --dport 80</tt>


This would monitor port 80 traffic. Add something like "-j DROP" to it, and this IP address effectively cannot browse websites anymore while it can still connect to other services.

Hope that helps.

Gerard Beekmans

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