CompTIA
XK0-006 · Question #81
A user sends a request to access a virtual server via SSH. Which of the following commands is used to open the SSH standard port?
The correct answer is A. firewalld-cmd --permanent --add-port=22/tcp. The firewalld-cmd --permanent --add-port=22/tcp command (commonly firewall-cmd) opens TCP port 22 in the permanent firewalld ruleset so that SSH traffic is allowed. After running it, you’d issue firewall-cmd --reload to apply the change.
Security
Question
A user sends a request to access a virtual server via SSH. Which of the following commands is used to open the SSH standard port?
Options
- Afirewalld-cmd --permanent --add-port=22/tcp
- Biptables-save | grep dport-22/tcp
- Ciptables -A INPUT -p tcp --dport sshd -j ACCEPT
- Dfirewalld-cmd --remove-service=ssh --permanent
How the community answered
(26 responses)- A69% (18)
- B15% (4)
- C4% (1)
- D12% (3)
Explanation
The firewalld-cmd --permanent --add-port=22/tcp command (commonly firewall-cmd) opens TCP port 22 in the permanent firewalld ruleset so that SSH traffic is allowed. After running it, you’d issue firewall-cmd --reload to apply the change.
Topics
#firewalld#SSH#port management#firewall rules
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