Ubuntu 22.04
Ubuntu 22.04 LTS must have an application firewall enabled
STIG ID:
UBTU-22-251020
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SRG:
SRG-OS-000480-GPOS-00232
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Severity:
Medium
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CCI:
CCI-000366
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Vulnerability ID:
V-260516
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.
Check
C-64245r953359_chk
Verify the Uncomplicated Firewall (ufw) is enabled on the system with the following command: $ systemctl status ufw.service | grep -i "active:" Active: active (exited) since Thu 2022-12-25 00:00:01 NZTD; 365 days 11h ago If "ufw.service" is "inactive", this is a finding. If the ufw is not installed, ask the system administrator if another application firewall is installed. If no application firewall is installed, this is a finding.
Fix
F-64153r953360_fix
Enable and start the ufw by using the following command: $ sudo systemctl enable ufw.service --now