Using Telnet to test ports

To test if a connection is succcessful through a specific port, use the Telnet command.

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

For Example:

telnet {machinename} 5120

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

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

If a message indicating telnet is not a recognized command, it may be necessary to enable it on the operating sytem.

http://social.technet.microsoft.com/wiki/contents/articles/910.how-to-enable-telnet-client-in-windows-7.aspx

A common Test for Protect would be:

Console to Target:

telnet {machinename} 5120

Target to Console:

telnet {machinename} 3121

Related:

Shavlik Protect Inbound and Outbound Port Requirements Explanations

http://community.shavlik.com/docs/DOC-22939