I have installed Ubuntu 25.10 in a standalone Qube and configured it to use sys-whonix for networking. However, I’m experiencing issues, as I am unable to access the web or install packages via the terminal. The wired connection in Ubuntu is active, and I can confirm that it recognizes the MAC addr…

How did you install Ubuntu in the SVM? Through the installation ISO? I think that in such a case you’ll need to manually set the IP address, gateway, DNS and netmask in your SVM’s network settings.