Latest edit (26-10-2022): I finally managed to set up the router on v1.2.1 firmware. Creating (bidirectional) ACL rule for each Vlan to block inter-vlan. Check this new post. Edit (11-10-2022): The...

In my experience, at least in standalone mode, it doesn't not block bi-directionally. When I wanted to stop any traffic between two vlans to both directions, I needed to create two ACL rules for each.

If I could have found this thread 2 days ago... I never intend to jump on updating new firmware immediately, always wait some time to see others' reaction. It's been a while that v1.2.0 was released...

@ldrewes Isn't it that your browser tries to access on https? I remember that has happened and I manually had to edit the domain field to change to http to be able to access that IP address.

@Alfamation Have you already figured it out? Actually, if you had the beta or later the stable (v1.1.1) firmware release or even another, the most fresh (v1.2.0) release running on your router, you...

@tchiobtcha If you provided the printscreen of the related setup pages, would be more chance for anyone with knowledge here to help you. This router, accourding to the developers, does let inter-vlan...