Linux中在防火墻中開啟80端口方法示例

vi /etc/sysconfig/iptables

-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT

/etc/init.d/iptables stop 
#start 開啟 
#restart 重啟

# Firewall configuration written by system-config-firewall 
# Manual customization of this file is not recommended. 
*filter 
:INPUT ACCEPT [0:0] 
:FORWARD ACCEPT [0:0] 
:OUTPUT ACCEPT [0:0] 
-A INPUT -m state –state ESTABLISHED,RELATED -j ACCEPT 
-A INPUT -p icmp -j ACCEPT 
-A INPUT -i lo -j ACCEPT 
-A INPUT -m state –state NEW -m tcp -p tcp –dport 22 -j ACCEPT 
-A INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT 
-A INPUT -m state –state NEW -m tcp -p tcp –dport 3306 -j ACCEPT 
-A INPUT -j REJECT –reject-with icmp-host-prohibited 
-A FORWARD -j REJECT –reject-with icmp-host-prohibited 
COMMIT
/etc/init.d/iptables restart

vi /etc/sysconfig/iptables
-A INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT（允許80端口通過防火墻） 
-A INPUT -m state –state NEW -m tcp -p tcp –dport 3306 -j ACCEPT（允許3306端口通過防火墻）

[root@localhost ~]# /etc/init.d/iptables restart 
iptables：清除防火墻規(guī)則：                 [確定]
iptables：將鏈設(shè)置為政策 ACCEPT：filter          [確定]
iptables：正在卸載模塊：                  [確定]
iptables：應(yīng)用防火墻規(guī)則：Bad argument `–-state'
Error occurred at line: 11
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
                              [失敗]

[root@centos httpd]# /sbin/iptables -I INPUT -p tcp --dport 80 -j ACCEPT
[root@centos httpd]# /etc/rc.d/init.d/iptables save
[root@centos httpd]# /etc/init.d/iptables restart

[root@centos httpd]# /etc/init.d/iptables status