Linux Fundamentals · lesson 14 of 15 · 15 min

Firewall with ufw

summary: A host firewall controls traffic to and from one system. Define the required service and use the narrowest rule possible. Verify that legitimate access still works after a change.

question: What is the safest firewall approach?

options:

• Allow only required traffic
• Allow all ports
• Disable the firewall
• Block all logging

correct: Allow only required traffic

explanation: Allowing only what is needed reduces exposure.

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