Command code?

【root@localhost？ ~]#? vi？ /etc/sysconfig/iptables

Correct configuration file?

Configuration code?

#? Firewall? Configuration? Written? By who? System-Configuration-Firewall

#? Manual? Customization? Yes? This? Documents? Is it? Isn't it? Recommended.

* Filter

: input? Accept? [0:0]

: Forward? Accept? [0:0]

: output? Accept? [0:0]

-A？ Input? -m？ Status? -Status? Established, related? -j？ accept

-A？ Input? -p？ icmp？ -j？ accept

-A？ Input? -Me? lo？ -j？ accept

-A？ Input? -m？ Status? -Status? New? -m？ tcp？ -p？ tcp？ -Port? 22? -j？ accept

-A？ Input? -m？ Status? -Status? New? -m？ tcp？ -p？ tcp？ -Port? 80? -j？ Accept?

-A？ Input? -j？ Refuse? -Refuse? Icmp- Host-Forbidden

-A？ Forward? -j？ Refuse? -Refuse? Icmp- Host-Forbidden

commit a crime

Configure [*] wildcard code?

-A？ Input? -m？ Status? -Status? New? -m？ tcp？ -p？ tcp？ -Port? *? -j？ Accept?

Note: the newly opened port must be after port 22?

Restart the firewall for the configuration to take effect?

Command code?

【root@localhost？ ~]#? /etc/init.d/iptables？ Restart?

Other?

View open ports?

Command code?

【root@localhost？ ~]#? /etc/init.d/iptables？ Status?

Turn off the firewall

Command code?

【root@localhost？ ~]#? /etc/init.d/iptables？ Stop?