Redirection is a mature and robust redirection plugin, for managing 301 redirections and logging 404 errors. A tremendous help when rearranging your website or migrating a new site to an existing domain.
The non-existing page https://oldrup.net/invalid-url will redirect here if Redirection plugin is active.
Extract from WordPress.org
Create and manage redirects quickly and easily without needing Apache or Nginx knowledge. If your WordPress supports permalinks then you can use Redirection to redirect any URL.The plugin can also be configured to monitor when post or page permalinks are changed and automatically create a redirect to the new URL.https://wordpress.org/plugins/redirection/