The preferred way of installing Icinga Web 2 is to use the official package repositories depending on which operating system and distribution you are running. But it is also possible to install Icinga Web 2 directly from source.

• A web server, e.g. Apache or nginx
• PHP >= 5.3.0 w/ gettext and OpenSSL support
• MySQL or PostgreSQL PHP libraries when using a database for authentication or storing user preferences into a database
• LDAP PHP library when using Active Directory or LDAP for authentication
• Icinga 1.x w/ Livestatus or IDO, Icinga 2 w/ Livestatus or IDO feature enabled