Apache/Nginx webserver (SSL recommended) with PHP module (PHP (>= 7.2.0) with ldap, gettext, xml, openssl and optional OpenSSL)
Some LAM plugins may require additional PHP extensions (you will get a note on the login page if something is missing)
Perl (optional, needed only for lamdaemon)
Any standard LDAP server (e.g. OpenLDAP, Active Directory, Samba 4, OpenDJ, 389 Directory Server, Apache DS, ...)
A recent web browser that supports CSS2 and JavaScript, at minimum: Firefox (max. 2 years old) Edge (max. 2 years old) Opera (max. 2 years old) Chrome (max. 2 years old)