Generate IPv6 Private Prefix

GenerateIP6Prefix.md

Prefix using RFC 4193

Seed

Generate bytes from local server

echo "$(date +%s%N)$(cat /var/lib/dbus/machine-id)" | sha1sum | cut -c 31-

output of the form:

65ede472f0 -

ULA

Combine with FD in 2 + 4 + 4 format to get prefix

fd65:ede4:72f0::/64

Credits

Condensed from excellent article at Digital Ocean - How To Set Up WireGuard on Debian 11