I have a problem with Windows Server 2019 to be able to open some network ports.
Does no matter if firewall is enabled or not, incoming rules are setup some ports does not works.
Only some of the ports works installed with features.
If I want to run something else like Sage 50 port 13531 , WSUS 8530, SpiceWorks 9676 i can see only sync packet coming in and that's all.
There is no any other firewall installed.
I can connect to local host on those ports, but even if I use external IP address of the server it does not work.
It does not work from clients computers as well.
It looks like process is listening only on localhost (127.0.0.1).
System is setup as a virtual machine in Hyper-V.
All other virtual machines do not have this problem, so I know that this is not related with physical hardware or virtual switch.
Did anybody experienced similar problem ?