Roby wrote, on 22/03/2019:
---cut
>
> Good idea !
> The remote router used the provider's DNS.
> Now I have entered google DNS (8.8.8.8) but nothing in the RPI3 has changed.
> The default gateway in the RPI3 is correct (ip route | grep default | cut -d'
> ' -f3) and corresponds to the router address.
> But I can't verify which DNS uses the RPI3 because I don't have the nslookup
> command available and cause error 404 the 'sudo apt-get install dnsutils'
> does not work
> Do you have suggestions to check which DNS uses rpi3 ?
>
----cut

PING is OK:
sudo ping archive.raspberrypi.org   PING lb.raspberrypi.org
(46.235.227.11)
sudo ping mirrordirector.raspbian.org   PING
mirrordirector.raspbian.org (93.93.128.193)
-----
These are the 404 errors with 'sudo apt-get update':
Ign http://mirrordirector.raspbian.org jessie InRelease
Ign http://archive.raspberrypi.org jessie InRelease
Ign http://mirrordirector.raspbian.org jessie Release.gpg
Ign http://archive.raspberrypi.org jessie Release.gpg
Ign http://mirrordirector.raspbian.org jessie Release
Ign http://archive.raspberrypi.org jessie Release
Err http://archive.raspberrypi.org jessie/main armhf Packages
  404  Not Found [IP: 46.235.227.11 80]
Err http://archive.raspberrypi.org jessie/ui armhf Packages
  404  Not Found [IP: 46.235.227.11 80]
Ign http://archive.raspberrypi.org jessie/main Translation-en
Ign http://archive.raspberrypi.org jessie/ui Translation-en
Err http://mirrordirector.raspbian.org jessie/main armhf Packages
  404  Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org jessie/contrib armhf Packages
  404  Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org jessie/non-free armhf Packages
  404  Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org jessie/rpi armhf Packages
  404  Not Found [IP: 93.93.128.193 80]
Ign http://mirrordirector.raspbian.org jessie/contrib Translation-en
Ign http://mirrordirector.raspbian.org jessie/main Translation-en
Ign http://mirrordirector.raspbian.org jessie/non-free Translation-en
Ign http://mirrordirector.raspbian.org jessie/rpi Translation-en
W: Failed to fetch
http://mirrordirector.raspbian.org/raspbian/dists/jessie/main/binary-armhf/Pack
ages
 404  Not Found [IP: 93.93.128.193 80]

W: Failed to fetch
http://mirrordirector.raspbian.org/raspbian/dists/jessie/contrib/binary-armhf/P
ackages
 404  Not Found [IP: 93.93.128.193 80]

--
Roby

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