The telnet popup tool is very useful debugging feature in the admin dashboard.\\
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The menu is here on the server admin dashboard:\\
[attachments|telnet_menu1.png]\\
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Or here on all other admin pages:\\
[attachments|telnet_menu2.png]\\
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It allows you to test port connectivity from the perspective of your CrushFTP server.  Its not really a full telnet tool, but it can give you the basics of true socket error messages.\\
This example shows it connecting and displaying the SSH header message of our server.\\
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[attachments|telnet.png]\\
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Example for a connection refused...meaning we reached the server, but no server port was listening:\\
[attachments|telnet_refused.png]\\
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Example for a connection timeout...meaning we could not reach the server because a firewall dropped our connection attempt:\\
[attachments|telnet_timeout.png]\\
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The wording is very specific and informative...there is a difference between refused, and timed out, and connected.