UniFi Access Points, error http code: 000, ntp issues
TL; DR: Scroll down for the simple solution. Read on for the full discovery of how intricately I shot myself in the foot with solid network security practices. So I had this very niche error with the UniFi access points. Any time I tried to upgrade the access point in the UniFi controller web interface, it would fail silently. Further investigation showed that upgrading from the console, using the upgrade command would write the following in /var/log/messages of the AP-AC-Pro-Gen2...