Telnet: Difference between revisions
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(Created page with " <b>telnet</b> -- user interface to the TELNET protocol. Useful to do a quick connection test to a remote server on a specific port. (<b>Nmap</b> might be more useful at times) ====How to use Telnet==== ---- To test is port 22 (SSH) is open on a remote server: $ telnet 34.195.120.102 22 Trying 34.195.120.102... Connected to 34.195.120.102. Escape character is '^]'. SSH-2.0-OpenSSH_7.4 To escape, hit <b>ctrl + ]</b>. You will get dropped down to th...") |
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Not telnet but use Test-NetConnection in powershell. See: https:// | Not telnet but use Test-NetConnection in powershell. See: https://dikapediav2.com/wiki/Test-NetConnection | ||
Latest revision as of 20:04, 10 October 2024
telnet -- user interface to the TELNET protocol. Useful to do a quick connection test to a remote server on a specific port.
(Nmap might be more useful at times)
How to use Telnet
To test is port 22 (SSH) is open on a remote server:
$ telnet 34.195.120.102 22 Trying 34.195.120.102... Connected to 34.195.120.102. Escape character is '^]'. SSH-2.0-OpenSSH_7.4
To escape, hit ctrl + ].
You will get dropped down to the telnet prompt. To quit, hit q then enter.
$ telnet 34.195.120.102 22 Trying 34.195.120.102... Connected to 34.195.120.102. Escape character is '^]'. SSH-2.0-OpenSSH_7.4 ^] telnet> q Connection closed.
How to open a listener for Telnet
If you simply just want to test connectivity but don't have a process listening on a particular port, you can simply open a listener using nc -l command:
1) On listening host run the following to open a listener on port 1500:
nc -l 1500
2)On the client machine, run the following command to check connectivity:
telnet <ip> 1500
How to telnet from a Windows machine
Not telnet but use Test-NetConnection in powershell. See: https://dikapediav2.com/wiki/Test-NetConnection