How to Stop the Linux Firewall

The Linux firewall helps to protect the server from damaging content on the Internet or network. When disabling the firewall, it is a good idea to disconnect the server from the Internet or network to avoid possible damages to the system. Technically, a firewall is just a combination of two other network functions: a gateway and a proxy. A firewall does have its advantages, but it does not work alone. A secure system also requires effective monitoring and intrusion detection, and a solid plan to be implemented in case of a security breach.

Instructions

Red Hat, CentOS or Fedora Linux Users

1. Login to Linux as a root user.

2. Type in the following at the command prompt: "/etc/init.d/iptables stop" without the quotes. Another option is in Step 3.

3. Type "service iptables stop" without the quotes at the command prompt.

Debian, Ubuntu or Suse Linux Users

1. Login to Linux as a root user.

2. Type "iptables -F" at the command prompt without the quotes.

3. Type "iptables -X" at the command prompt without the quotes.

4. Type "iptables -t nat -F" at the command prompt without the quotes.

5. Type "iptables -t nat -X" at the command prompt without the quotes.

6. Type "iptables -t mangle -F" at the command prompt without the quotes.

7. Type "iptables -t mangle -X" at the command prompt without the quotes.

8. Type "iptables -P INPUT ACCEPT" at the command prompt without the quotes.

9. Type "iptables -P FORWARD ACCEPT" at the command prompt without the quotes.

10. Type "iptables -P OUTPUT ACCEPT" at the command prompt without the quotes.

Tips & Warnings

• To verify the firewall is off, type "service iptables status" without the quotes. You should receive the message "Firewall is stopped."

References

• Hakuna Matata Linux Site

Resources

• Other Linux Firewall Commands