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On 2020-01-30 06:20 PM, Hans-Peter Jansen wrote:
Dear James,
Am Donnerstag, 30. Januar 2020, 19:32:32 CET schrieb James Knott:
I've been running IPv6 on my notebook computer for years, using NetworkManager to configure the networking. The consistent IPv6 address had long been based on the MAC address, but now it's a random number. How did this happen and what do I do to go back to the MAC based address? As always, the temporary privacy addresses are random. I'm not on a NM based system ATM, but you might get started with:
nmcli c
to show the connections, and
nmcli c show uuid | less
to browse their settings. Search for mac, cloned and ipv6.
You can modify values with
nmcli c modify uuid key value
I'm struggling with a pathological behavior, where NM swaps the WIFI MAC address with eth0 (during operation many 100th times a day). arpwatch generates two mails for each swap (back and forth)... MUCH fun.
While not solved, it might provide some insights for you, too:
I think you have a different issue. My problem is that I'm getting a random number, instead of the MAC based IPv6 addresses. That nmcli c command doesn't tell me anything useful. Some people are worried about MAC addresses being used in IPv6 addresses, in that someone could identify a particular computer by the IPv6 address. For that reason, "privacy addresses" are used for outgoing connections, with a random number in place of the MAC based address. However, that isn't an issue for incoming connections, where you'd have a DNS record pointing to a consistent address. Some have taken that privacy issue to far, by using the random number for incoming connections too. If you worry about those privacy issues, I don't think it would be a concern if, for example, you took a computer to a coffee shop etc., as that MAC based address will never be used, unless you deliberately intend it to be. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org