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Run Telnet on Git Bash

Although telnet is not used regularly since insecure, it’s a handy tool for testing ports.

For example, to check if a port 80 is open, you run this command.

$ telnet servername 80

Git Bash does not come with telnet, but you can use the Windows version by using winpty.

$ winpty telnet servername 457
Connecting To servername...Could not open connection to the host, on port 457: Connect failed

If port is open, you get an empty reply, just like in Windows.

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Where in Windows

How to find where the executable is located in Windows? Use the where command in CMD.

where gcloud
C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\bin\gcloud
C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\bin\gcloud.cmd

It will list multiple locations if you have several versions installed on your system.

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Powershell Test Network Connection

Here’s the command to test a network connection in Powershell.

C:> Test-NetConnection -ComputerName server -Port 443

Result:

ComputerName     : server
RemoteAddress    : 10.0.0.5
RemotePort       : 443
InterfaceAlias   : Ethernet 0
SourceAddress    : 10.1.1.34
TcpTestSucceeded : True