Ubuntu Linux, which you can set up to operate as a server, comes complete with firewall utilities to prevent unwanted network traffic from reaching your computer. The ufw utility included with Ubuntu makes configuring your firewall from the command line simple. By default, the firewall is disabled, but if you think the firewall is enabled and you need it disabled, you can use ufw to check the firewall's status and disable it. You will need root access to disable the firewall.
Open a terminal. Select "Accessories" from the "Applications Menu" and choose "Terminal."
Type "sudo ufw status" at the command prompt and press "Enter." Enter the root password when prompted and press "Enter." The terminal will output the status of the firewall when the password is entered correctly. If the firewall is active, continue to Step 3 to disable it.
Disable the firewall by typing "sudo ufw disable" and press "Enter." If prompted again, enter the root password. Repeat Step 2 to confirm that the firewall is disabled.
Tips & Warnings
- Firewalls exist to prevent unwanted network traffic from reaching your computer; disabling your firewall might expose your computer to dangerous network traffic.
- Photo Credit Comstock/Comstock/Getty Images
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