Hello, Before, I had configured my network with 4 subnets. 0 = VPN address range; 1 = wired network; 2 = wireless network; 3 = guests. There were a limited number of static IP addresses (wired-network devices like printer and some other fixed-IP device). There was a DHCP server, which (based on MAC address) allocated the IP addresses. Based upon IP address, access to resources (mainly samba network shares) was granted or disabled. There was room for some (limited number of) guests in the DHCP address range (could only browse the Internet or play games with my son). I had control (in the logs) over the allocated IP (guest) addresses. Now, with IPv6's auto-configuration, combined with Windows privacy extensions, this whole concept is somewhat less secure and straightforward in my opinion : - anyone (wirelessly) plugging into the network, requesting "some" IP address will now get one of plenty IPv6 addresses; there's no limit anymore on "how much" guests I can admit in the network, let alone which IP address I can allocate. - even if I restrict the own Windows computers's usage of the (Windows) privacy extensions, still I see 2 extra IPv6 addresses present in these Windows computer's ipconfig's outputs. Extern Windows computers aren't even "IPv6 address- controllable" at all. In other words : control over allocation of IPv6 IP addresses is basically gone. - my network's DNS lookups get complicated this way, as the one-to-one link IP address vs. hostname is gone. - access to the samba network shares isn't that straightforward anymore either, because my former division in subnets is basically gone too. - I haven't found too much options in radvd.conf which could help me in this setup either. My question : how do I handle (one or more of) these issues the best ? Is maybe a basic question, but one and a half week ago, I was still "only" thinking in IPv4- terms. So I may not (yet) have catched all configuration possibilities...