Hello peelpel94,
I hereby publicly accept the issue at hand. I'm sorry you are having this issue and I'll do my best to resolve it. As stated in the other threads, we realize that non-malicious connections can be blocked if they appear suspicious. Even if the originating computer is in your local network - local SMB is a common vector for spreading malware from a computer to the rest of the network (as explained for example here:
https://blog.malwarebytes.com/101/2018/12/how-threat-actors-are-using-smb-vulnerabilities).
When multiple consecutive authentication attempts from a single IP fail, the Remote Access Shield classifies this as suspicious behavior. Therefore they are blocked. The PC originating the connections could be infected with malware trying to self propagate, or be part of a botnet launching a brute force attack. It is also possible that an application is trying to access shared folders (e.g., a video player trying to load shared videos/songs) without correct credentials, but it's impossible for the shield to know. In this case I'd advise to find the responsible application and configure it correctly or disable it.
I realize it's annoying to have block messages that could likely be "false positives", and that it can make the shield inconvenient enough to disable it and compromise the computer's security. We are indeed working on ways to decrease the number of false positives. But in this case, investigation seems to be the fastest option. If you don't know the origin of the connections, you can use software like Wireshark to capture the network traffic on port 445 and take a look at the username in the connection attempts - it might provide some clues (screenshot of a captured unsuccessful connection attempt included).
As for the "Block all connections except the following" - its purpose is not to whitelist an address and remove it from scanning. It is meant to block all addresses outside of the specified address/range. That could explain why it didn't solve the Remote Access Shield blocking connections from your computer.
