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An application firewall must be enabled on the system.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-75805 | UBTU-16-030040 | SV-90485r2_rule | Medium |
| Description |
|---|
| Firewalls protect computers from network attacks by blocking or limiting access to open network ports. Application firewalls limit which applications are allowed to communicate over the network. |
| STIG | Date |
|---|---|
| Canonical Ubuntu 16.04 LTS Security Technical Implementation Guide | 2018-07-18 |
Details
| Check Text ( C-75493r2_chk ) |
|---|
| Verify the Uncomplicated Firewall is enabled on the system by running the following command: # sudo systemctl is-enabled ufw enabled If the above command returns the status as "disabled", this is a finding. If the Uncomplicated Firewall is not installed, ask the System Administrator if another application firewall is installed. If no application firewall is installed this is a finding. |
| Fix Text (F-82435r2_fix) |
|---|
| Enable the Uncomplicated Firewall by using the following commands: # sudo systemctl start ufw # sudo systemctl enable ufw |