Run ufw status.
ufw status
Mission 25
Firewall and incident review
Inspect firewall state, add a simulated rule, and write a short incident note.
Security administrationufwgrepechocat
Lesson 25 of 360
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Security administration · 10 minutes
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learner@clairos:/home/learner $
Unix ops lab: type a command, press Enter
Instructions
10 minutes
Click any instruction for the command details, the why, and the common mistake to avoid.
Run ufw deny 23/tcp.
ufw deny 23/tcp
Run echo reviewed-denied-logins > incident-review.txt.
echo reviewed-denied-logins > incident-review.txt
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Lesson support
What to notice while you play.
Practice firewall inspection and lightweight incident documentation.
Use ufw status before adding a simulated deny rule.
Security changes need evidence and notes, even in a toy lab.
- Adding rules before checking current state.
- Finishing an incident review without notes.
Reference
Commands in this lesson.
echo <text>
Print text or write lab notes with >.
cat <file>
Print text file contents.
grep [-i] <text> <file>
Find literal text inside a file.
ufw status
Inspect simulated firewall rules.