Hello, Aurelien, Interestingly, this doesn’t happen on a native Debian 10 box running libc-bin 2.28-10, (which was also having trouble with Google DNS in the VirtualBox guests on my mac).
Since you’ve pointed out pretty clearly from the pcap that Google and VirtualBox are having some bizarre interaction, I think we can close this as “not a bug.” I apologize for taking up your time with it. Kindest regards, Mike Przybylski > On May 17, 2020, at 8:19 PM, Mike Przybylski > <mike.przybyl...@appdynamics.com> wrote: > > Hi, Aurelien, > > Well spotted. This is a Debian 11, (formerly 10), guest in VirtualBox on a > Mac host running Catalina. Let me see if I can reproduce this on a native > Debian box. I will update with my results one way or another. > > Kindest regards, > Mike Przybylski > >> On May 16, 2020, at 3:45 PM, Aurelien Jarno <aurel...@aurel32.net >> <mailto:aurel...@aurel32.net>> wrote: >> >> I >> noticed that the IP of your host is 10.0.2.15. Could it be a QEMU or >> Virtualbox VM running with the user mode network stack? >