- “localhost” can never be accessed from another computer. It would only call itself.
- The port MUST be allowed through both firewalls (client and server). Not “just in case”, this is mandatory. TCP incoming and outgoing rules are necessary.
- A port can only be used by one application at a time. If something else is using port 9080 it will be blocked. Doesn’t matter if that is on the server or the client. If the FBW is using a port, nothing else can use the same one.
- Make sure that nothing else (Antivirus etc.) prevents external communications.