Moin Roland, On Tue, Jul 14, 2020 at 10:42:35PM +0200, Roland F.Teichert wrote: > All workstations loose after half an hour their IP address. > The syslog tells me: > LehrerPC avahi-daemon[460] :withdrawing address record 10.0.0.2. on eth0 > LehrerPC avahi-daemon[460]: Leaving mDNS multicastgroup on interface > eth0.IPv4with address 10.0.0.2 This is supposed to be a follow-up action after losing the IP address - not the reason for losing it. > ip addr shows, there is no IP. > This happens at all workstation (not the workstation on tjener). As opposed to workstations, tjener has a static IP address. We had a similar issue before (to update the hostname after a reboot), see https://bugs.debian.org/933580 > The only solution is a new boot - for another half an hour. > Does anybody has an idea or a solution? Please move /etc/network/if-up.d/wpad-proxy-update out of the way and test if this helps. Currently, I don't have a Debian Edu Buster test environment, so your feedback could help to fix this bug. Wolfgang
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