Enable the CentOS system to close the firewall and open specific ports

I have mentioned that the newly purchased server of the company uses CentOS5.5. after deploying Tomcat, I found that I entered 114. 80. *. *: 8080 (ip: 8080), but the default Tomcat homepage cannot be displayed. Because it was previously deployed in the WinServer VPS and only used localhost during Linux development, it was a little too big. Okay, G. The Internet said it was a Firewall problem. I have mentioned before that the newly purchased server of the company uses CentOS5.5. after deploying Tomcat, I found that I entered 114. 80. *. *: 8080 (ip: 8080), but the default Tomcat homepage cannot be displayed. Because it was previously deployed in the WinServer VPS and only used localhost during Linux development, it was a little too big.

Okay, G. I have a firewall problem on the Internet.
/Etc/init. d/ IptablesStop
After it is disabled, check 114. 80. *. *: 8080 (ip: 8080) again. However, it seems that security risks are greatly increased ......

　 Use
/Etc/init. d/iptables status
View the firewall information and view the opened port.

It is feasible to open the port to be used. the command is as follows:
/Sbin/iptables-I INPUT-p tcp -- dport 8080-j ACCEPT #8080 indicates the specified port
/Etc/rc. d/init. d/iptables save # save the changes
/Etc/init. d/iptables restart # restart the firewall to make the change take effect. of course, you can restart the system if you do not feel the trouble (Command: reboot)
Of course, another line is added directly to/etc/sysconfig/iptables:
-A RH-Firewall-1-INPUT-m state Cstate NEW-m tcp-p tcpCdport 8080-j ACCEPT
View firewall information:
#/Etc/init. d/iptables status
Disable the firewall service:
#/Etc/init. d/iptables stop
Permanently disable the firewall
Chkconfig Clevel 35 iptables off # this method is originated from the network and has not been tested. Therefore, you are not allowed to use this method for security reasons.