By doing what you said above you don't get what the filter was created for, the pings are low in the game except for 1 or two which are generally very different (in the order of 100 ms fluctuating, perhaps because they have a connection WI-Fi or a VPN). Furthermore, the feeling that the players are not from the limited area, but external and this is because it is not possible to completely isolate the server on which you want to play, in fact I always have to leave not only my closest server (Milan) but also the external server in Ireland otherwise the Call Of Duty Modern Warfare 3 game will not start. Also last night before going to bed I unchecked IPV6 and today when I tried to play the connection was interrupted, the DHCP seemed dead even after setting the static and restoring IPV6, so I had to reset all the settings to be able to connect again (I'm not sure if removing IPV6 triggered the DHCP problem). All in all, however, I like it, I get much more consistent hits and the pings are quite low. The firmware is 4.0.21 and I would be happy to try another firmware if you have it. Thank you
P.S.
Consider that to start the game I have to start via battlenet and I assume that it asks for authorization from the server in Ireland which works in complicity with the one in Milan to search for people in the game (and this is probably why it is not possible to limit the geofilter area completely )