To protect
the firewall (OpenWRT) by blocking ssh incoming connections to it from the out
interface we should use the following rule:

Question

Accepted Answer

iptables –t filter –A INPUT –i out –p tcp --dport 22 –j DROP

Answer

iptables –t filter –A INPUT –i out –p udp --dport 22 –j DROP

Answer

iptables –t filter –A FORWARD –i out –p tcp --dport 22 –j REJECT

Answer

iptables –t filter –A OUTPUT –i out –p udp --dport 22 –j REJECT

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