System has 2 compiled PHP versions. Default 5.4.32 for fcgid and mod_php. And 5.4.32 compiled with PHP-FPM support, which should be default for 99.999999% of users. Creating user and allowing him to have only "Disabled" and "PHP-FPM" PHP modes. Then creating "Site" within this client and choosing only active php mode out of two, "PHP-FPM", ISPconfig in PHP versions below shows me two options: -Default -php_54_fpm And just for experiment creating website with "Default" php version while having php-fpm mode - throws no errors. How? Why? I'm not giving user ability to have site running mod_php or fastcgi. As I understood it is just hardcoded piece of code. I would like to make kind of request regarding this "issue". It would be nice to change "Default" php version for client let's say It will be linked to php_54_fpm in my case. Or better aproach might be restrict visible PHP versions through Client Limits templates (Main/Additional) ?