Jun 06, 2017

Unable to open port 443 Sep 10, 2014 debug - check port open without telnet - Server Fault What do people use when Telnet is not installed to check a port is open and reachable? E.g. I used to use the technique of telnet and know it was there, even if telnet could not interact with the system on the other end.. With Windows 2008 telnet is not installed so I've been a bit lost. Using telnet to Test Open Ports | The Complete How-To To open telnet, click “Go” > “Utilities” > "Terminal", then run the following command (the numbers are example IP address and port): telnet [domainname or ip] [port], e.g.>telnet 192.168.1.1 443 When a computer port is open a blank screen will show up, meaning that the connection has been successful. How to Check Which Ports Are in Use in Windows 10

Jul 06, 2017

Open Port Check Tool - Test Port Forwarding on Your Router

As shown on the screenshot above, I have used “telnet” to connect to www.google.com at port 443. The reply from Google is “ Connected ” which means that port 443 is open. Now, let’s try to “ping” (connect) to a random port (e.g 12345) which is probably closed:

Question on how to Open port 443 - Microsoft Community