DNS delay on first lookup, Ubuntu 19.10 but not earlier versions

[Chris Green]

On Wed, Apr 01, 2020 at 08:52:51AM +0100, Colin Law wrote:
> On Tue, 31 Mar 2020 at 22:31, Chris Green <cl at isbd.net> wrote:
> >
> > On Tue, Mar 31, 2020 at 10:10:44PM +0100, Peter Flynn wrote:
> > >
> > > On 31/03/2020 21:26, Chris Green wrote:
> > > > I have a small home LAN with dnsmasq running on a Raspberry Pi to
> > > > provide DHCP and DNS services.  I have two systems running xubuntu 19.10
> > > > and on these systems I see a 5 second delay the *first* time I look up
> > > > the address of a local host.  Subsequent lookups are fast
> > > > but if the system is idle for a long time (I haven't quite fathomed
> > > > out how long) I see the 5 second delay again.
> > >
> > > I've had this many times and always assumed it's my ISP.
> > >
> > > Peter
> > >
> > Well not for LAN lookups, nothing goes outside my LAN in this case.
> 
> How does it resolve esprimo.zbmc.eu without going outside the network?
> 
The Raspberry Pi on the LAN runs dnsmasq which provides DHCP and DNS
so when a system asks for the address of esprimo.zbmc.eu the Raspberry
Pi answers.

-- 
Chris Green