Knowledgebase: Network
Telnet guide for Windows
Posted by Simon  , Last modified by Simon   on 25 August 2020 11:20 AM

Telnet is generally used for checking connectivity from your location to your APC’s server destination ports.  For example to check if the network you are using allows you to connect to a certain port at your server.

How to perform a telnet test from your location:

(Windows PC)
- Click “Start menu” go to “Run” 
- In the “Run” box, type “CMD” 
- With the command prompt open type: telnet <your APC server ip address> <port number>

- Example telnet 8.8.8.8 53

- If you encountered the following output: 

'telnet' is not recognized as an internal or external command,
operable program or batch file.

It means that telnet is not installed. 

If you are using Windows 10, you can follow this url on how to enable the telnet function through the graphical user interface. 

Once telnet is enabled, run the command again. 


- If successful.


- If not successful you will see error "Connecting To <your APC server ip address>...Could not open connection to the host, on port <your port number>: Connect failed



- There are a number of reasons for the failure and we advice contacting us at support@apc.sg including providing screenshots of your telnet results above for APC to advice further.

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