List current chains:<\/p>\n
iptables -L<\/pre>\nInsert into chain INPUT in 1st position to accept only on tcp protocol from the 192.168.1.0\/24 network from port 443 to IP 192.168.1.51 port 443<\/p>\n
iptables -I INPUT 1 -p tcp -s 192.168.1.0\/24 --sport 443 -d 192.168.1.51 --dport 443 -j ACCEPT<\/pre>\nInsert into 4th position into chain INPUT<\/p>\n
iptables -I INPUT 4 -p tcp -s 192.168.1.0\/24 --sport 443 -d 192.168.1.51 --dport 443 -j ACCEPT<\/pre>\nAppend to the end of chain INPUT<\/p>\n
iptables -A INPUT -p tcp -j DROP<\/pre>\nAlways issue one of the following (depending on distro) to have changes survive reboot:<\/p>\n
iptables-save<\/pre>\nWith systemd:<\/p>\n
systemctl iptables save<\/pre>\nWith Upstart:<\/p>\n
service iptables save<\/pre>\nIf none of the above work:<\/p>\n
\/etc\/init.d\/iptables save<\/pre>\nIf you are on a Debian based distro (Ubuntu, Mint, etc.), remember to install iptables-persistent:<\/p>\n
apt install iptables-persistent<\/pre>\n","protected":false},"excerpt":{"rendered":"List current chains: iptables -L Insert into chain INPUT in 1st position to accept only on tcp protocol from the 192.168.1.0\/24 network from port 443 to IP 192.168.1.51 port 443 iptables -I INPUT 1 -p tcp -s 192.168.1.0\/24 –sport 443 -d 192.168.1.51 –dport 443 -j ACCEPT Insert into 4th position into chain INPUT iptables -I … Continue reading IPTables Firewall Configs<\/span>