How can I find out, if network connectivity is allowed to a specific destination address and TCP port?
If you know the destination IPv4 address, move to next step. If not, find the IPv4 address based on DNS name:
nslookup very.important-destination-domain.com or ping very.important-destination-domain.com
IPv4 address and
TCP port known, I can use PowerShell Cmdlet to run the connectivity test:
Test-NetConnection 10.100.190.5 -Port 443
Happy debugging ;)