[PROBLEM] DNS problem in Moode 8.1.2?

[TheOldPresbyope]

In the bad ol' days---or good ol' days, depending on your point of view---we regularly had to exchange hosts files containing the hostnames and their IP addresses of all the Unix workstations on our organization's network. 

Then Sun Microsystems won the day with NIS aka Sun Yellow Pages. The nsswitch function glued it together with DNS and later mDNS. In some ways things got better "bigly"; in other ways not so much

Regards,
Kent