- Inspecting the fail2ban log on a host I tried to get the domain-names for banned IPs.
- Of course some could not be resolved and a lot resolved to dynamic addresses or just AWS.
- Puzzlingly some of them (as the one in the title) come back with a pointer to localhost. including the dot.
I know that you may set localhost as part/label of a FQDN, but how is it possible to set localhost as FQDN in DNS?