How to Stop a CentOS 5.4 Firewall

CentOS, the Community Enterprise Operating System, is a Linux distribution based on the source code from Red Hat's commercial but open-source Enterprise Linux system. CentOS includes the IPTables firewall, which is on by default and prevents unauthorized access to system services. You can disable the IPTables firewall from the Security Level and Firewall graphical administration tool or from the terminal using the "service" command. Anyone will be able to connect to any services listening on your CentOS system after you disable the firewall.

Instructions

Graphical Desktop

1. Click the "System" menu; click "Administration" and click "Security Level and Firewall."

2. Type your root password into the prompt window that appears and press "Enter."

3. Click the box to the right of "Firewall" and click "Disabled."

4. Click the "OK" button.

Terminal

1. Click "Applications," "System Tools" and "Terminal" to open a terminal.

2. Type "su" into the terminal and press "Enter" to become the root user.

3. Type your root password when prompted and press "Enter."

4. Type "/sbin/service iptables stop" into the terminal and press "Enter" to stop the firewall.

References

• Red Hat: 43.8.2.1. Security Level Configuration Tool
• Red Hat: 42.9. IPTables