LPIC-1 System Architecture Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✓

  Step 1: Add the SSH allow rule using iptables (e.g., iptables -A INPUT -p tcp --dport 22 -j ACCEPT). Step 2: Save the current iptables rules to a file (e.g., iptables-save > /etc/iptables/rules.v4). Step 3: Install and enable iptables-persistent to load rules on boot.

  Why this is correct

  This is the correct order because you first define the rule, then save the current ruleset, and finally ensure the rules persist after reboot by installing iptables-persistent.

• ✗

  Step 1: Save the current iptables rules to a file. Step 2: Add the SSH allow rule. Step 3: Install and enable iptables-persistent.

  Why it's wrong here

  This order is incorrect because saving before adding the rule would save an empty or outdated ruleset, missing the new SSH rule.

• ✗

  Step 1: Add the SSH allow rule. Step 2: Install and enable iptables-persistent. Step 3: Save the current iptables rules.

  Why it's wrong here

  This order is incorrect because installing persistence before saving means the persistence setup may not include the new rule, and saving after persistence might overwrite the persistence configuration.

• ✗

  Step 1: Install and enable iptables-persistent. Step 2: Add the SSH allow rule. Step 3: Save the current iptables rules.

  Why it's wrong here

  This order is incorrect because setting up persistence before adding the rule will load an empty or previous ruleset on boot, and adding the rule after persistence does not automatically make it persistent unless saved correctly.

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