i haven't had internet on the host from the start. only noticed when trying to download a CT template and started troubleshooting from there.
root@oracle:~# cat /etc/resolv.conf
search dns.fritz.box
nameserver 192.168.178.1
root@oracle:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc...