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Your worker & master nodes won't be able to access the 10.42 or 10.43 networks. Those are set non-routeable from the host OS. You'll need to create a shell in a running pod if you want to test DNS. If you're running Rancher it's an easy option, if not it can be done with a

kubectl exec

command (though I always botch it at first and have to look up the right syntax to run bash).