Jun 13, 2016
Aug 11, 2019 Test-NetConnection: Check for Open/Closed Ports from Aug 27, 2019 Check port open status for port 443 - LinuxQuestions.org
Using netcat, you can check if a single or multiple or a range of open ports as follows.The command below will help us see if the port 22 is open on the host 192.168.56.10: $ nc -zv 192.168.1.15 22 In the command above, the flag:-z – sets nc to simply scan for listening daemons, without actually sending any data to them.-v – enables verbose mode.
Feb 02, 2018
c# - Check if a port is open - Stack Overflow
If at least one of these connections is successful, port 443 is open on your end. To determine if port 443 is open at a remote server address, follow Steps 2 through 4. Click "Start" and position your cursor in the "Search" box. Transmission Control Protocol (TCP) port 443 is the default port used by Hypertext Transfer Protocol Secure (HTTPS).