Re: easy to remember addresses and /etc/hosts and DNS

[Mark Smith <[e-mail]>]

On Fri, 26 Apr 2019 at 19:54, Alexandre Petrescu
<[e-mail]> wrote:
>
>
>
> Le 26/04/2019 à 11:46, Mark Smith a écrit :
> > On Fri, 26 Apr 2019 at 19:28, Alexandre Petrescu
> > <[e-mail]> wrote:
> >>
> >>
> >>
> >> Le 26/04/2019 à 06:31, Brian E Carpenter a écrit :
> >>>
> >>>
> >>> Regards Brian Carpenter
> >>>
> >>> On 25-Apr-19 21:48, Philip Homburg wrote: ...
> >>>> The main example you gave is somebody typing IPv6 literals while
> >>>> sitting in a car.
> >>>
> >>> Indeed, we said from the very beginning (I mean 1994) that users
> >>> should never be required to type in IPv6 addresses.
> >>>
> >>> Is this so hard to avoid?
> >>
> >> It may be easy to avoid typing IPv6 addresse when DNS was available.
> >>
> >> But think about three cars in a covoy; the convoy is disconnected from
> >> the IPv6 Internet, yet fully connected on IPv6 between all computers in
> >> the convoy.  Which of the cars should host the DNS server?
> >>
> >
> > All of them.
>
> Mark,
>
> Thank you very much for the suggestion.  I will consider it.
>
> I would like to ask you: is multicast DNS (mDNS) working on a single
> subnet only?  Or does it work across subnets?
>

I'm not an expert in mDNS or related, have just read enough to know
what problem they're solving and (very) roughly how it works.

DNS Service Discovery is intended to convey that information across subnets:

http://www.dns-sd.org/

> (because the numerous computers in these three cars are not all on a
> single subnet; they are all interconnected with IP, but there are
> multiple subnets with routers in between).
>

There may be other options that better suit or can be better made to
suit what you're trying to do, such as the work done in the Homenet or
the ANIMA Working Groups.

Autonomic networking (the focus of ANIMA WG), sounds like it might be
working on solutions to your problem domain.

"Autonomic networking refers to the self-managing characteristics
(configuration, protection, healing, and optimization) of distributed
network elements, adapting to unpredictable changes while hiding
intrinsic complexity from operators and users."


Regards,
Mark.

> Alex
>
> >
> > http://www.multicastdns.org/
> >
> > Multicast DNS
> > https://www.ietf.org/rfc/rfc6762.txt
> >
> > There's also a good book on it:
> >
> > ""Zero Configuration Networking: The Definitive Guide
> > https://www.amazon.com/gp/product/0596101007
> >
> >
> > A number of implementations:
> >
> > https://www.avahi.org/ - Linux
> >
> > https://developer.apple.com/bonjour/ - Apple, Windows
> >
> > And if you want to know what inspired it,
> >
> > "Requirements for a Protocol to Replace the AppleTalk Name Binding
> > Protocol (NBP)"
> > https://tools.ietf.org/html/rfc6760
> >
> > This is why you need to explain your problem, not just what you think
> > is the solution. You'll get much quicker answers.
> >
> > <snip>
> >