Users cannot access a server after it has been restarted. At the server console, the administrator runs the following commands: Which of the following is the cause of the issue?

The correct answer is B. The SSH service has not been allowed on the firewall. The server is running and responding to pings, and DNS resolves correctly (dig server1 → 192.168.0.2). The ss -lnt output shows SSH (port 22) is listening, but the firewall (firewall-cmd -- list-all) does not list SSH among the allowed services. Therefore, external users cannot…

Troubleshooting

Question

Users cannot access a server after it has been restarted. At the server console, the administrator runs the following commands:

Which of the following is the cause of the issue?

Exhibit

Options

AThe DNS entry does not have a valid IP address.
BThe SSH service has not been allowed on the firewall.
CThe server load average is too high.
DThe wrong protocol is being used to connect to the web server.

How the community answered

(13 responses)

A
8% (1)
B
69% (9)
C
23% (3)

Explanation

The server is running and responding to pings, and DNS resolves correctly (dig server1 → 192.168.0.2). The ss -lnt output shows SSH (port 22) is listening, but the firewall (firewall-cmd -- list-all) does not list SSH among the allowed services. Therefore, external users cannot connect because the firewall is blocking SSH.

Topics

#SSH#firewall#service access#network troubleshooting

Community Discussion

No community discussion yet for this question.

Full XK0-006 Practice