Hi @GVS ,
if you want to test if a TCP port on a public IP is listening you can try this:
https://ping.eu/port-chk/
If the port is not available there are a few things to check:
- Is the port listing on the VM at all (depends on OS, service, config of VM, the service is bound on the IP/port of the VM)
- Is the OS firewall allowing/blocking inbound communication on this port
- Is a Network Security Group (NSG) associated with the VM or the subnet the VM is connected to. If so, is there a NSG rule configured for inbound communication on this port
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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten