--On Sunday, September 19, 2021 3:02 PM +0200 hw <hw at gc-24.de> wrote: > None of this is working because the server isn't running a DHCPv6 server, > and there seems to be no file in /var/lib/NetworkManager that would seem > to be helpful. > > Isn't there a tool that creates the DUID and prints it? This can't be > too difficult ... I found this thread that suggests that NetworkManager computes it every time unless it's manually overridden: <https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/135> Based on that, nmtui-connect might do what you want.