Run ssh -G lab.
ssh -G lab
Mission 345
Security administration bridge
Checkpoint SSH policy, identity, listeners, and firewall evidence.
Security administrationsshgrepssufw
Lesson 345 of 360
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Security administration · 8 minutes
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learner@clairos:/home/learner $
Unix ops lab: type a command, press Enter
Instructions
8 minutes
Click any instruction for the command details, the why, and the common mistake to avoid.
Run grep PermitRootLogin /etc/ssh/sshd_config.
grep PermitRootLogin /etc/ssh/sshd_config
Run ss -tulpn.
ss -tulpn
Run ufw status verbose.
ufw status verbose
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Lesson support
What to notice while you play.
Build repeatable confidence with assembling a defensible security posture review.
Start with ssh -G lab, inspect the result, then continue in order.
Assembling a defensible security posture review helps operators explain what they know before they change anything.
- Skipping the output that proves assembling a defensible security posture review.
- Changing several things before recording a baseline.
Reference
Commands in this lesson.
grep [-i] <text> <file>
Find literal text inside a file.
ss|ip
Inspect simulated sockets and addresses.
ssh|scp|ssh-keygen
Practice SSH inspection and dry-run transfer shapes without network access.
ufw status
Inspect simulated firewall rules.