XK0-006 Security Practice Question
An administrator needs to ensure that only users from the 'ops' group can SSH into a server. Which configuration in /etc/ssh/sshd_config accomplishes this?
⚠ Common exam trap
Candidates often confuse `AllowUsers` (which matches usernames) with `AllowGroups` (which matches group membership), leading candidates to select option C when the requirement specifies group-based restriction.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AllowGroups ops
The `AllowGroups` directive in `/etc/ssh/sshd_config` restricts SSH access to only users who are members of the specified group. By setting `AllowGroups ops`, only users belonging to the 'ops' group will be permitted to log in via SSH, which directly meets the requirement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
AllowGroups ops
Why this is correct
Correct: AllowGroups restricts by group membership.
- ✗
Match Group ops DenyUsers *
Why it's wrong here
This would deny all users in ops group, opposite.
- ✗
AllowUsers ops
Why it's wrong here
AllowUsers specifies usernames, not groups.
- ✗
DenyUsers all
Why it's wrong here
DenyUsers all denies all users, not just non-ops.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 practice question is part of Courseiva's free CompTIA 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 XK0-006 exam.