Just a thought....
The main Internet "in" line to the building goes to a router the building owns that then splits off to all the flats. When I connect a router in our flat normally (using the "in" line and put it into the "in" connection in our own router) that is where the trouble may start.
BUT - if I plug the Ethernet line that comes into the flat into one of the four "out" connections, and then run the lines to our computers from the other three remaining "out" connections in our router, it becomes an access point, and not a router. Is it just me or does any of this make sense??
Here's how it looks in stick-diagram format:
|------> Out ("Line In" is now plugged into this one)
|------> Out ("Line Out" to computer #1)
|------> Out ("Line Out" to comp #2)
|------> Out ("Line Out" to comp #3)
|
|------< Normal "IN" line, now unused
So far so good. I'll advise if there are any further connection issues using this "workaround" method.
~ R.D.