iptables

iptables⚑

Usage⚑

Allow from range from an interface to an specific port⚑

iptables -A INPUT -p tcp -i [interface] -s [range] --dport [port] -j ACCEPT

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Install⚑

iptables-persistent⚑

When installed, it will save the current rules. If you want to save more afterwards, you have to manually save them:

iptables-save >/etc/iptables/rules.v4

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Tips⚑

Clear all rules and allow all traffic⚑

iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT

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