@David-TP Thanks for your help. I've made those changes today, but to be fair, the Zoom log-in issue seemed to resolve itself. After my original post I had to go back onto the TPLink ArcherVR600, as...

I use Zoom all the time on my home network and today I suddenly could not log in to Zoom, either on the Zoom app or via my browser. All other websites etc worked, even other areas of the Zoom...