When changing from phpBB 3.x to WoltLab Suite Forum 3, the old internal links no longer work. To resolve this issue, use the descriptions below.
If an .htaccess file in the main directory of your WoltLab Suite installation (CMS) already exists, open your .htaccess file and add the descriptions below to the beginning of the file. If there is no .htaccess file yet, you can create it with a text editor.
The example assumes that you have installed the CMS in the main directory of the domain and the forum in the subfolder /forum/. Otherwise you must adjust the path accordingly.
Apache / Litespeed