mod_auth_radius

Hello Mr Alan Thank you very much for your help and wish to help me I working on freeradius management system and every things go fine , I integrated captive portal with fortigate firewall , but if my customer has different type of firewall, what I do? Must I integrate captive portal for another firewall ? I found mod_auth_radius modul and I think this module will convert my apach server as NAS so it can working instead of firewall right? How can I use it ?