About once a minute syslog shows the following errors. The corresponding address range does not correspond to any network interfaces. Why is nmbd trying to send packages to this address?
Code
nmbd[29958]: Packet send failed to 172.18.255.255(138) ERRNO=Network is unreachable
nmbd[29958]: [2021/02/25 17:04:52.747002, 0] ../source3/libsmb/nmblib.c:917(send_udp)