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Online to see a Linux firewall rules example, recorded for future reference purposes
sbin / iptables -P INPUT DROP
/ Sbin / iptables -I INPUT -p tcp-dport 80 -j ACCEPT
/ Sbin / iptables -I INPUT -p tcp-dport 22 -j ACCEPT
/ Sbin / iptables -A INPUT -j DROP
/ Sbin / iptables -A INPUT -j LOG
/ Sbin / iptables -A FORWARD -p tcp-syn -m limit-limit 1 / s -j ACCEPT
/ Sbin / iptables -A FORWARD -p tcp -tcp-flags SYN, ACK, FIN, RST RST -m limit -limit 1 / s -j ACCEPT
/ Sbin / iptables -A FORWARD -p icmp-icmp-type echo-request -m limit-limit 1 / s -j ACCEPT
/etc/init.d/iptables save /etc/init.d/iptables restart |
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