If you look back at the original script I gave you
Code:
#!/bin/bash
iptables -P INPUT DROP
iptables -P OUTPUT DROP
iptables -P FORWARD DROP
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT
iptables -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --dport 80 -j ACCEPT
iptables -A OUTPUT -p tcp --dport 443 -j ACCEPT
iptables -A OUTPUT -p tcp --dport 67 -j ACCEPT
iptables -A OUTPUT -p udp --dport 67 -j ACCEPT
iptables -A OUTPUT -p tcp --dport 53 -j ACCEPT
iptables -A OUTPUT -p udp --dport 53 -j ACCEPT
# Add any other ports you need to reach external services in the format above
it contains a comment that explains how to allow other external services.
so your format is basically
Code:
iptables -A OUTPUT -p tcp --dport $portnumber -j ACCEPT
Does that make sense?
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