macos-and-additional-dns

macOS and additional DNS definition for certain namespace

We have an internal DNS server for few machines in local network. So lets add it to my macOS for that specific domain resolving.

UI way

https://support.apple.com/guide/mac-help/specify-a-dns-server-on-mac-mchlp2720/10.15/mac/10.15 This didn't work for me well

• setting is network specific - e.g. Wi-Fi, Thunderbolt ethernet, Thunderbolt bridge, ...
• dig command didn't find the IP for the hostname
  • might be user error of course, might not (see below)

Anyway I like the second way more.

Command line way

https://medium.com/@jamieeduncan/i-recently-moved-to-a-macbook-for-my-primary-work-laptop-7c704dbaff59 is the best and the simplest description of the command line way.

echo "nameserver 10.0.0.1" > /etc/resolver/quarkus
scutil --dns

But wait, dig console-openshift-console.apps.ocp-xyz.dynamic.quarkus returns NXDOMAIN! As written in the article dig and nslookup on OSX don’t use the OS resolver configuration, this blocked me for a while before finding that medium.com article.

Solution is to use dscacheutil -q host -a name console-openshift-console.apps.ocp-xyz.dynamic.quarkus or browser.