If you connect to a corporate VPN it doesn’t resolve the corporate internal domains!
It seems you need something like splitDNS but haven’t managed to configure it.
Currently Ubuntu does not offer an easy way to set up a “global” DNS for all network connections: whenever you connect to a new WiFi network, if you don’t want to use the DNS server provided by the WiFi, you are forced to go to the network settings and manually set your preferred DNS server.https://andrea.corbellini.name/2020/04/28/ubuntu-global-dns/
Chosen Provider – Quad9:
Has IPV6 too.
To use or not to use DNSSEC right now
A New Kind of Instant Messaging
With the rise of government monitoring programs, Tox provides an easy to use application that allows you to connect with friends and family without anyone else listening in. While other big-name services require you to pay for features, Tox is totally free, and comes without advertising.
Bash scripts to set up/bootstrap low end virtual servers