Using Telnet to Test Ports

Version 10

    Purpose

     

    To test if a connection is successful through a specific port.

     

    Note: Operating Systems Vista and newer may require enabling this feature first.

     

    How to Enable the telnet client for Windows Vista, 7, 2008, 8, & 2012

     

    Access Control Panel\All Control Panel Items\Programs and Features

    On the left side, click on "Turn Windows features on or off"

    Once the list loads up, scroll down and look for "Telnet Client". Put a check in the box next to this, then hit "OK". It may take a few minutes to install telnet client.

     

    Using Telnet

     

    Open Command Prompt and enter: telnet {MachineName} {Port}

     

    For Example:


    telnet {machinename} 5120

    telnet.png

     

    If the command prompt returns a blank screen the connection was successful on the indicated port.

    telnet result.png

     

    If an error occurs verify the MachineName as well as port. If Machine name is correct, the port may be blocked.

    failed.png

     

    A common Test for Protect would be:

    Console to Target:

    telnet {machinename} 5120

     

    Target to Console:

    telnet {machinename} 3121


    Console to Agent:

    telnet {agentmachinename} 4155

     

    Additional Information

     

    Related Documentation:

     

    http://community.shavlik.com/docs/DOC-2161

    Shavlik Protect Inbound and Outbound Port Requirements Explanations

    Shavlik Protect Inbound and Outbound Port Requirements Explanations

     

    You can find more information on telnet with the following methods:

     

    In command prompt run: telnet -?

     

    Refer to the following Microsoft articles:

    Telnet protocol: http://support.microsoft.com/kb/231866

    Telnet commands: http://technet.microsoft.com/en-us/library/bb491013.aspx

     

    Affected Product(s)

     

    Protect Version: All