Port Audit — Lantern & Quill Books

Find the host exposing an unauthorized service, shut it down, and verify.

N10-007 · 5.2 N10-007 · 5.5 N10-007 · 1.1 APNET · 3.6.B APNET · 1.1.B

You volunteer as the network steward for Lantern & Quill, a small bookstore and café on the 10.40.7.0/24 shop network. A quarterly checklist says every device should expose only the services it needs — and Telnet must never be running, since it sends logins in clear text and should always be replaced by SSH. Audit the seven hosts, locate the one still listening on the Telnet port, disable that service, and confirm the port has closed.

Your workstation: events-laptop (10.40.7.21). Type help to see available commands.

steward@events-laptop

steward@events-laptop:~$

Shop network

quiet flagged port cleared

Audit checklist

✓Scan all hosts on 10.40.7.0/24 for open ports.
✓Connect to the host that is listening on the Telnet port.
✓Stop and disable the Telnet service on that host.
✓Re-check listening ports to confirm Telnet is closed.

Audit questions

Q1Which well-known TCP port did the unauthorized service use?

Q2Which host was exposing it? (hostname or IP)

Q3Which insecure protocol was running, that SSH should replace?

Q4Which command did you use to confirm the port stopped listening?

Callsign

Progress: 0 / 8

Formative lab — checks run in your browser, so the checklist and score are self-reported. The instructor's grading script can re-score on the server if a submission needs to be authoritative. Use a pseudonymous callsign; never enter your real name, email, or student ID.
Tags — N10-007: 5.2 · 5.5 · 1.1 | AP Networking: 3.6.B · 1.1.B.