Diagnosing WordPress Permalink 404 Errors Print

If the WordPress home page works but posts or custom routes return 404, the rewrite rules used by pretty permalinks may be stale or unavailable.

1. Open WordPress → Settings → Permalinks.
2. Save the permalink settings to refresh rewrite rules.
3. Retest a normal post or page.
4. Review .htaccess if the site uses Apache-compatible rewrite rules and the problem continues.
5. Check whether a custom post type and a page use conflicting slugs.

Do not change DNS for a permalink-only 404 when the WordPress home page already reaches the correct server.