Redhat Linux 8.0 IPtables help

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Hi,



I have Linux machine with single Network interface. I want to block all the
tcp,udp and icmp port's other then 22,23,24 and 80.



Can you verify the following script?





IPTABLES=/sbin/iptables



$IPTABLES -P INPUT DROP
$IPTABLES -P OUTPUT DROP
$IPTABLES -P FORWARD DROP

$IPTABLES -A INPUT -p tcp -m multiport --destination-port 22,23,24,80 -j
ACCEPT



$IPTABLES -A INPUT -p udp -m multiport --destination-port 22,23,24,80 -j
ACCEPT





What port should I block for icmp protocol?



-SR




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