Configure iptables to open port 80

Iptables-F // clear rules iptables-AINPUT-ptcp -- dport22-jACCEPT/* allow packets from port 22 into */iptables-AOUTPUT-ptcp -- sport22-mstate -- stateESTABLISHED-jACCEPT/* allow from 22 port entry package return */iptables-AOUT Iptables-F // clear the rule
Iptables-a input-p tcp -- dport 22-j ACCEPT/* allow packets to enter from port 22 */
Iptables-a output-p tcp -- sport 22-m state -- state ESTABLISHED-j ACCEPT/* packets allowed to enter port 22 are returned */
Iptables-a output-p udp -- dport 53-j ACCEPT
Iptables-a input-p udp -- sport 53-j ACCEPT
Iptables-a input-s 127.0.0.1-d 127.0.0.1-j ACCEPT/* allow local access to the local machine */
Iptables-a output-s 127.0.0.1-d 127.0.0.1-j ACCEPT
Iptables-a input-p tcp-s 0/0 -- dport 80-j ACCEPT/* allow all IP addresses to access port 80 */
Iptables-a output-p tcp -- sport 80-m state -- state ESTABLISHED-j ACCEPT
Iptables-save>/etc/sysconfig/iptables/* save the configuration or use the command serviceiptables save */
Iptables-L
The 80 and 22 values can be abbreviated:
/Sbin/iptables-I INPUT-p tcp -- dport 80-j ACCEPT
/Sbin/iptables-I INPUT-p tcp -- dport 22-j ACCEPT
Disable 192.168.0.7 connection Memcached
Iptables-a input-s 192.168.0.7-p tcp -- dport 11211-j DROP
Only the specified ip address is allowed to access the specified port.
Iptables-a input-s 74.81274.142-p tcp -- dport 9306-jACCEPT
Iptables-a input-p tcp -- dport 9306-j DROP # if there is A rule at the bottom of the iptables table that rejects rules other than all rules, this line does not need to be written.