Re: how to prefer temporary address? (raspbian / stretch)

Le 17/08/2019 à 11:26, Andrea Borgia a écrit :
> 
> At the moment my raspy (stretch-based Raspbian) is getting a /128 static 
> lease from my router out of the /48 I get from the he.net tunnel.
> It also has a /64 address which seems stable across reboots but is not a 
> slaac address.

It would be clearer if you posted the output of

  ip -6 addr

If you have privacy concerns feel free to mangle the /48 prefix assigned 
by the tunnel broker.

> Where does this /64 address come from? In the logs I see it mentioned by 
> avahi-daemon and dhcpd but I cannot find a corresponding lease file.

dhcpd (ISC DHCP server) or dhcpcd (DHCP client daemon) ?

> More important, how do I get the sytem to generate and prefer a 
> temporary address for outgoing connections?

  sysctl net.ipv6.conf.${INTERFACE}.use_tempaddr=2

How to set it at the system configuration level depends on the network 
configuration framework used. With ifupdown, add the following option to 
the iface stanza in /etc/network/interfaces :

  privext 2