Hi,
You've just blocked port 10308 with the port filtering rule. You don't need to open a specific port, unless you're hosting a server, then you need to set up a port forwarding rule for port 10308, which should point to your internal IP of your machine. I recommend you uninstall the ESET firewall as it messes up the TCP/IP stack of your OS and let only Windows Defender do its job. Let us know how it went.
Cheerios!