This LPIC-1 practice question tests your understanding of essential system services and networking. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company runs a web server using Apache with multiple virtual hosts. The administrator needs to restrict access to a specific virtual host based on the client IP address. Which configuration directive should be placed inside the <VirtualHost> block to deny IP 192.168.1.100?
Require host 192.168.1.100
Why wrong: Require host is for hostnames, not IPs.
Require not ip 192.168.1.100
New syntax: Require not ip denies the specific IP.
Deny from 192.168.1.100
Why wrong: Apache 2.4 uses mod_authz_core; Deny from is deprecated.
Require valid-user
Why wrong: Valid-user requires authentication, not IP restriction.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Require not ip 192.168.1.100
Option B is correct because `Require not ip` is the Apache 2.4 syntax for access control. Option A is old syntax (Allow/Deny). Option C is for host-based. Option D is for valid-user.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Require host 192.168.1.100
Why it's wrong here
Require host is for hostnames, not IPs.
Require not ip 192.168.1.100
Why this is correct
New syntax: Require not ip denies the specific IP.
Related concept
Standard ACLs match source addresses.
Deny from 192.168.1.100
Why it's wrong here
Apache 2.4 uses mod_authz_core; Deny from is deprecated.
Require valid-user
Why it's wrong here
Valid-user requires authentication, not IP restriction.
Common exam traps
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
What to study next
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related LPIC-1 ACL questions on filtering logic and placement.
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FAQ
Essential System Services and Networking — This question tests Essential System Services and Networking — Standard ACLs match source addresses..
The correct answer is: Require not ip 192.168.1.100 — Option B is correct because `Require not ip` is the Apache 2.4 syntax for access control. Option A is old syntax (Allow/Deny). Option C is for host-based. Option D is for valid-user.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related LPIC-1 ACL questions on filtering logic and placement.
Standard ACLs match source addresses.
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Last reviewed: Jun 24, 2026
This LPIC-1 practice question is part of Courseiva's free LPI certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the LPIC-1 exam.
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