@stephdl, I tried to install nethserver-docker recently and never succeed to log onto portainer; always got 500 server errors.
Decided it was really too cutting edge technology and preferred to go for a DO droplet and uninstalled the thing.
Now I get plenty of those messages :
Dec 16 20:37:51 mattlabs nmbd[30919]: [2018/12/16 20:37:51.755513, 0] ../source3/libsmb/nmblib.c:873(send_udp) │
Dec 16 20:37:51 mattlabs nmbd[30919]: Packet send failed to 172.28.255.255(138) ERRNO=Operation not permitted │
Dec 16 20:37:51 mattlabs nmbd[30919]: [2018/12/16 20:37:51.755637, 0] ../source3/libsmb/nmblib.c:873(send_udp) │
Dec 16 20:37:51 mattlabs nmbd[30919]: Packet send failed to 172.28.255.255(138) ERRNO=Operation not permitted │
Dec 16 20:38:10 mattlabs systemd: Starting Time & Date Service...
Maybe there is something not handled when uninstalling.
Txs