Unencrypted remote access. Insecure — replaced by SSH. Still used in legacy systems and network equipment.
Test it now with our Port Scanner
| Port | 23 |
|---|---|
| Service | Telnet |
| Protocol | TCP |
| Encrypted | No |
| Common Use | Unencrypted remote access |
Online: Use our Port Scanner — enter your IP and port 23.
Command line:
nc -zv your-server-ip 23 (Mac/Linux)
Test-NetConnection -ComputerName your-server-ip -Port 23 (PowerShell)
Check locally:
ss -tlnp | grep :23 (Linux) netstat -an | findstr :23 (Windows)