Why Stale DNS Causes Connection Failures
When a mirror address points to a new CDN IP address, your local operating system or router might keep resolving to the obsolete IP for hours due to cached Time-To-Live (TTL) values.
How to Flush DNS on Windows ```cmd ipconfig /flushdns ```
How to Flush DNS on macOS ```bash sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder ```
Once flushed, restart your browser and reconnect to the mirror.