I think I found the answer to (3): In dom0:
/usr/lib/python3.11/site-packages/qubes/config.py #: site-local prefix for all VMs qubes_ipv6_prefix = 'fd09:24ef:4179:0000' Then, this is used in /usr/lib/python3.11/site-packages/qubes/vm/mix/net.py So, qubes get addresses like these: fd09:24ef:4179::a89:*/128 fd09:24ef:4179::a8a:*/128 My conclusion: The IPv6 CIDR for Qubes internal network are: fd09:24ef:4179::a89:0/112 fd09:24ef:4179::a8a:0/112 It is still a mystery where all those prefixes come from. -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/20240503173610.3d83eb50%40localhost.