On Thu, 11 Nov 2021 21:52:22 +0000 potlatch via tor-relays tor-relays@lists.torproject.org wrote:

Hello All, My VPS host recently moved one of my Tor exits to cloud ops (I believe AWS). Since that time the instance will not function as an exit. Torcc and keys are as before. I was operating on Ubuntu 21.04 but reloaded to 20.04. Still the same. I messed with the netplan config to no avail. George brought this to my attention and suggested (and I agree) a DNS problem. I can't find where it's failing--to be honest I don't have much experience with cloud instances or netplan. I am of the opinion that there is a conflict between the cloud hosting and Tor. When I call Nyx I see the strange exit policy: reject [FC00:'string of zeros']/7:*, reject [FE80:'string of zeros off of Nyx page']. Other exits I operate are fine in the cloud. Thanks for any help you can provide.

Start with the simplest, if you login to the VPS via SSH and run:

ping google.com

does that work? Or says "unknown hostname"? Secondly, check /etc/resolv.conf for what DNS servers your system is using, and if they are still the correct ones to use after your VPS was moved.