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iptables - block all ports except 20-21
#3

I created an account just for this topic because I was searching for a similar thing but I wanted to leave 21/80/443/25etc...

 

the reason is that an attacker recently uploaded an irc server to /tmp folder and if the ports have been blocked from firewall the irc server can't do it's job. So the question has a meaning to me, thanks for the answers

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iptables - block all ports except 20-21 - by z0ny - 2005-01-27, 05:11 PM
iptables - block all ports except 20-21 - by Radu - ecommy - 2011-06-11, 05:37 AM

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