Hi Erwan, On Wed, Mar 20, 2019 at 10:28:55PM +0100, Erwan David wrote: > > How to get back the EUI64 Mac based address ?
[…] > So maybe it is network-manager which does this ? (privacy extensions set > to Default) Before we go on too much of a wild goose chase, can you confirm that you do actually use Network Manager to set up your networking? I do not use N-M anywhere where I have felt a need to modify its behaviour, but I understand that you can use "nmcli" to disable the privacy addresses: https://librehacker.com/2018/04/04/network-manager-and-ipv6-privacy/ Personally I find privacy addresses a useful feature, so in your position I would continue using them but also add static IPv6 addresses that are used for well-known services. So I'd have the best of both worlds: outbound connections using unpredictable source address, but known address for inbound connections. Cheers, Andy -- https://bitfolk.com/ -- No-nonsense VPS hosting