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+Template: knot-resolver/upgrade-buster-to-bullseye
+Type: note
+_Description: Upgrading from Knot Resolver < 5.x
+ Knot Resolver configuration file requires manual upgrade.
+ .
+ Up to Knot Resolver 4.x, network interface bindings and service
+ start were done by default via systemd sockets. These systemd sockets
+ are no longer supported, and upgrading from a 3.x version (as in Debian
+ Buster) requires manual action to (re)enable the service.
+ .
+ Please refer to kresd.systemd(7) and to the
+ /usr/share/doc/knot-resolver/upgrading.html file (from
+ knot-resolver-doc). An online version of the latter is available at
+ https://knot-resolver.readthedocs.io/en/stable/upgrading.html#x-to-5-x
+ .
+ For convenience, a suggested networking configuration can be found in
+ the file /var/lib/knot-resolver/.upgrade-4-to-5/kresd.conf.net