override ttl=0

[Herve Guehl]

Hi All,
I'm back...So what are my choice ?
1 - run my own patch ? ->  not a

On Jan 7, 2008 2:10 AM, Mark Andrews <Mark_Andrews at isc.org> wrote:

>
> > On Sat, 5 Jan 2008, Matus UHLAR - fantomas wrote:
> >
> > > On 04.01.08 15:52, Herve Guehl wrote:
> > >> My users choosed an external service, based on the fact that is fit
> their
> > >> needs.
> > >
> > > and you have problem with it. Either accept it as it is, or ask the
> custome
> > r
> > > to fix the problem where it lies... I don't think you'll solve
> anything by
> > > breaking the RFC...
> >
> > I think its very reasonable to enforce a minimum of at least 1 hour
> > many large networks do this, because we all know how many other
> > incompetant people there are out there in control of their own DNS
> >
> > > Maybe you and them should rethink what does "their needs" mean and
> what wil
> > l
> > > happen if it will continue causing the problem. Maybe if you converted
> "you
> > r
> >
> > It's barely noticable if a locally hosted domain has a laughable TTL
> like
> > 10m, but image if you host 30K domains, and every one of these idiots
> set
> > their TTL to 10 mins, think of the un-necessary bandwith and workload
> > those servers have to do when its not called for,  IIRC it wont accept
> > anything less than 10 minutes anyway, but in a day when no one runs
> > servers on dynamically assigned IP servers, I think the built in default
> > should be 1 hour at the very least.
>
>        Well people do run things on dynamic address these days.
>        The TTL of those addresses is usually derived from the DHCP
>        lease parameters.  If you have a 1 hour DHCP lease then the
>        DNS TTL should be about 15 minutes.  That allows for 1
>        missed DHCP renew.
>
>        People do you run ttl's down when they are about to switch
>        servers.
>
>        Yes, the DNS does suffer from the tragedy of commons.  That's
>        why education is important.  Everyone should be doing the
>        right thing and when you see someone doing the wrong thing
>        you inform them.  You don't just let them continue as it
>        just makes things worse regardless of what "fixes" you might
>        attempt.
>
>        Mark
>
> > --
> > Cheers
> > Res
> >
> > mysql> update auth set Framed-IP-Address='127.0.0.127' where user=
> 'troll';
> >
> >
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org
>
>
>