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XCCDF
Guide to the Secure Configuration of Ubuntu 22.04
System Settings
Network Configuration and Firewalls
Uncomplicated Firewall (ufw)
Set UFW Loopback Traffic
Set UFW Loopback Traffic
An XCCDF Rule
Details
Profiles
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Set UFW Loopback Traffic
Medium Severity
Configure the loopback interface to accept traffic. Configure all other interfaces to deny traffic to the loopback network.