Telnet
Master Telnet operations
Fence legacy devices behind VPNs and plan migration to modern tooling.
- Default port
- 23
- Protocol
- TCP
- Primary use
- Legacy remote console
Why Telnet matters
Some labs still depend on Telnet; confine access while you modernize.
Immediate actions
Segment Telnet hosts onto dedicated management networks or jump boxes.
Operational guardrails
Schedule upgrades toward SSH or vendor APIs and track progress visibly.