documentation:2.0:prereq
Keywords: documentation,2.0,prereq

# Prerequisites and dependencies

## Web Server

To use LemonLDAP::NG, you have the choice of the Web Server :

- Nginx
- Apache 2
- Any FastCGI or uWSGI compatible Web Server (Portal and manager only)

For Apache2, you can use all workers mpm-worker, mpm-prefork and mpm-event. Mpm-worker works faster and LemonLDAP::NG use the thread system for best performance but since Apache-2.4, mod_perl seems unstable in this configuration. If you have to use mpm-prefork (for example if you use PHP), LemonLDAP::NG will work anyway.

## Perl

Here the list of Perl modules used in LemonLDAP::NG. Core modules must be installed on the system. Other modules are required only if you plan to use related features.

### Core

- Apache::Session
- Cache::Cache
- Clone
- Config::IniFiles
- Convert::PEM
- Crypt::OpenSSL::Bignum
- Crypt::OpenSSL::RSA
- Crypt::OpenSSL::X509
- Crypt::Rijndael
- Crypt::URandom
- DBI
- Digest::HMAC_SHA1
- Digest::MD5
- Digest::SHA
- Email::Sender
- GD::SecurityImage
- HTML::Template
- HTTP::Headers
- HTTP::Request
- IO::String
- JSON
- LWP::UserAgent
- LWP::Protocol::https
- MIME::Base64
- MIME::Entity
- Mouse
- Net::LDAP
- Plack
- Regexp::Assemble
- Regexp::Common
- SOAP::Lite (optional)
- String::Random
- Unicode::String
- URI
- URI::Escape

### Deprecated features

- Old notifications format:
  - XML::LibXML
  - XML::LibXSLT
- OpenID 2.0:
  - Net::OpenID::Server
  - Net::OpenID::Consumer

### SAML2

- Lasso
- GLib
- XML::Simple

### Second factor

- Crypt::U2F::Server::Simple (U2F keys)
- Convert::Base32 (TOTP)

### Specific authentication backends

- Facebook:
  - Net::Facebook::Oauth2
- Kerberos:
  - GSSAPI
- PAM:
  - Authen::PAM
- Radius:
  - Authen::Radius
- Twitter:
  - Net::OAuth
- WebID:
  - Web::ID

### SMTP / Reset password by mail

- Email::Sender
- String::Random
- Net::SMTP

### Unit tests

- Test::POD
- Test::MockObject
- Crypt::U2F::Server
- Authen::U2F::Tester
- YAML

## Other

- Jquery (javascript framework) is included in tarball and RPMs, but is a dependency on Debian official releases

## Install dependencies on your system

You don't need to install them if you use LL::NG packages. With `apt` or `yum`, dependencies will be automatically installed.

### APT

Perl dependencies:

    apt install libapache-session-perl libcache-cache-perl libclone-perl libconfig-inifiles-perl libconvert-pem-perl libcrypt-openssl-bignum-perl libcrypt-openssl-rsa-perl libcrypt-openssl-x509-perl libcrypt-rijndael-perl libdbi-perl libdigest-hmac-perl libemail-sender-perl libgd-securityimage-perl libhtml-template-perl libio-string-perl libjson-perl libmime-tools-perl libmouse-perl libnet-ldap-perl libplack-perl libregexp-assemble-perl libregexp-common-perl libsoap-lite-perl libstring-random-perl libunicode-string-perl liburi-perl libwww-perl libxml-simple-perl libxml-libxslt-perl libcrypt-urandom-perl

For Apache:

    apt install apache2 libapache2-mod-fcgid libapache2-mod-perl2

For Nginx:

    apt install nginx nginx-extras

### YUM

You need EPEL repository. See below how to enable this repository: http://fedoraproject.org/wiki/EPEL/FAQ#howtouse

Perl dependencies:

    yum install perl-Apache-Session perl-Cache-Cache perl-Clone perl-Config-IniFiles perl-Convert-PEM perl-Crypt-OpenSSL-RSA perl-Crypt-OpenSSL-X509 perl-Crypt-Rijndael perl-Digest-HMAC perl-Digest-SHA perl-GD-SecurityImage perl-HTML-Template perl-IO-String perl-JSON perl-LDAP perl-Mouse perl-Plack perl-Regexp-Assemble perl-Regexp-Common perl-SOAP-Lite perl-String-Random perl-Unicode-String perl-version perl-XML-Simple

For Apache:

    yum install httpd mod_fcgid mod_perl

For Nginx:

    yum install nginx

As you need a recent version of Nginx, the best is to install Nginx official packages.