XK0-005 Question #134: Real Exam Question with Answer & Explanation

Question

All users are reporting that they cannot connect to the SFTP server. The administrator runs a scan: Which of the following would allow the administrator to fix the problem?

Options

• AAllow SFTP connections on port 22 using /etc/sysconfig/iptables.
• BAllow SFTP connections on port 20 and 21 using /etc/sysconfig/iptables.
• CAllow SFTP connections on port 25 using /etc/sysconfig/iptables.
• DAllow SFTP connections on port 1456 using /etc/sysconfig/iptables.

Explanation

Users cannot connect to the SFTP server, indicating a firewall is blocking the correct port for SFTP traffic.

Common mistakes.

• B. Ports 20 and 21 are used for traditional FTP, not SFTP, and opening these ports would not resolve SFTP connectivity issues.
• C. Port 25 is used for SMTP (Simple Mail Transfer Protocol), which handles email sending, and is unrelated to SFTP.
• D. Port 1456 is not a standard port for SFTP or any other common, related network service, and opening it would not resolve SFTP connectivity.

Concept tested. SFTP default port and firewall configuration

Reference. https://www.ssh.com/academy/ssh/port

No community discussion yet for this question.