Low commit activity in last 3 years
A long-lived project that still receives updates
Easy authentication to an LDAP server(s)
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 Dependencies
 Project Readme
SimpleLdapAuthenticator
=======================

Allows for simple authentication to an LDAP server with a minimum of
configuration.  Requires either Ruby/LDAP or Net::LDAP.   

Usage is fairly simple:
  require 'simple_ldap_authenticator'
  SimpleLdapAuthenticator.servers = %w'dc1.domain.com dc2.domain.com'
  SimpleLdapAuthenticator.use_ssl = true
  SimpleLdapAuthenticator.login_format = '%s @domain.com'
  SimpleLdapAuthenticator.logger = RAILS_DEFAULT_LOGGER
  class LoginController < ApplicationController
    def login
      return redirect_to(:action=>'try_again') unless \
        SimpleLdapAuthenticator.valid?(params[:username], \
        params[:password])  
      session[:username] = params[:username]
    end
  end

github: http://github.com/jeremyevans/simple_ldap_authenticator/tree/master