localhost woes -- help requested

[Rodney W. Grimes]

> > In message <201906190617.x5J6HQmA016708 at gndrsh.dnsmgr.net>, 
> > Rodney W. Grimes" <freebsd-rwg at gndrsh.dnsmgr.net> wrote:
> > 
> > >> In message <201906181719.x5IHJ8g0014687 at gndrsh.dnsmgr.net>, 
> > >> "Rodney W. Grimes" <freebsd-rwg at gndrsh.dnsmgr.net> wrote:
> > >> 
> > >> >What is in /etc/host.conf, /etc/resolv.conf, do you have DNS running?
> > >> 
> > >> 
> > >> 1)  https://pastebin.com/raw/wXTTgd9R
> > >This is /etc/hosts, not /etc/host.conf
> > ># cat /etc/host.conf
> > ># Auto-generated from nsswitch.conf
> > >hosts
> > >dns
> > >
> > >> 2)  https://pastebin.com/raw/PiGpN0LU
> > >> 
> > >> 3)  Yes, local-unbound
> > >
> > >Ok, if you comment out ::1 from /etc/hosts then the lookup is
> > >going to fall through to DNS with the default /etc/host.conf file
> > >and you'll get what ever your dns is configured to return, which
> > >is usually the exact some thing as /etc/hosts has.
> > 
> > So basically you're telling me that local-unbound has taken it upon
> > itself to decide for me, regardless of what is or isn't in my /etc/hosts
> > file, what addresses "localhost" should resolve to??
> 
> Yes, dns resolvers shipping for the last 5 decades have all shipped

Ooppps.. off by one calculation "near 4 decades"

> with default "localhost" values.  Both "localhost" and 127.in-addr.arpa
> zones existed iirc in the very first version of bind.
> 
> > 
> > If so, that really is rather presumptive on its part.
> 
> No, well defined by RFC.
> I would suggest a starting read at https://en.wikipedia.org/wiki/Localhost
> 
> Specifically this detail:
> 	In the Domain Name System, the name localhost is reserved as a
> 	top-level domain name, originally set aside to avoid confusion
> 	with the hostname used for loopback purposes.[3] IETF standards
> 	prohibit domain name registrars from assigning the name localhost. 
> 
> 
> And finally:
> https://tools.ietf.org/html/rfc2606#section-2
> at 
>       The ".localhost" TLD has traditionally been statically defined in
>       host DNS implementations as having an A record pointing to the
>       loop back IP address and is reserved for such use.  Any other use
>       would conflict with widely deployed code which assumes this use.
> 
> Regards,
> -- 
> Rod Grimes                                                 rgrimes at freebsd.org
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-- 
Rod Grimes                                                 rgrimes at freebsd.org