NSD will automatically start and bind itself to all available interfaces. If you run systemd-resolved (the focal default), this will fail. If you want to keep systemd-resolved, you must explicitly specify the interfaces and/or IP addresses that NSD should listen on.
NSD will automatically start and bind itself to all available interfaces. If you run systemd-resolved (the focal default), this will fail. If you want to keep systemd-resolved, you must explicitly specify the interfaces and/or IP addresses that NSD should listen on.