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.




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.


  • Apache::Session
  • Cache::Cache
  • Clone
  • Config::IniFiles
  • Convert::PEM
  • Cookie::Baker::XS
  • 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
  • Hash::Merge::Simple
  • 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
  • Text::Unidecode (Since LemonLDAP::NG 2.0.5)
  • Unicode::String
  • URI
  • URI::Escape

Deprecated features

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


Second factor

  • Crypt::U2F::Server::Simple (U2F keys)
  • Convert::Base32 (TOTP)
  • Authen::WebAuthn (FIDO2 WebAuthen)
  • Authen::OATH (OTP)

Specific authentication backends

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

SMTP & Reset password/certificate by mail

  • Email::Sender
  • String::Random
  • Net::SMTP
  • Net::SSLeay
  • DateTime::Format::RFC3339

Unit tests

  • Authen::U2F::Tester
  • Crypt::U2F::Server
  • Test::MockObject
  • DBD::SQLite
  • Test::Output
  • Test::POD
  • Time::Fake
  • YAML


  • Jquery (javascript framework) is included in tarball and RPMs, but is a dependency on Debian official releases
  • Cache::Memcached : used by SecureToken handler

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.


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 libhash-merge-simple-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 libtext-unidecode-perl libcookie-baker-xs-perl libio-socket-timeout-perl

For Apache:

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

For Nginx:

apt install nginx nginx-extras



You need EPEL repository. See below how to enable this repository:

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-Hash-Merge-Simple 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 perl-Crypt-URandom perl-Email-Sender

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.