Supaya CAS bisa mendukung ldap ada beberapa hal yang harus di lakukan :
1. edit pom xml di di rectory CAS server nya, tambahkan baris :
<dependency>
            <groupId>org.jasig.cas</groupId>
            <artifactId>cas-server-support-ldap</artifactId>
            <version>${project.version}</version>
            <scope>runtime</scope>
</dependency>
2. copy kan file cas-server-support-ldap-3.4.10.jar serta spring-ldap * ke dalam directory lib di CAS server nya.
3 edit deployerConfigContext.xml,
contoh deployerConfigContext.xml , saya copy pastekan karena di inet hanya clue nya saja ..
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:sec="http://www.springframework.org/schema/security"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.0.xsd">
        <bean id="contextSource" class="org.springframework.ldap.core.support.LdapContextSource">
  <property name="pooled" value="false"/>
  <property name="url" value="ldap://IP LDAP:PORT" />
  <property name="userDn" value="cn=[Nama MANAGER]"/>
  <property name="password" value="[PASSWDNYA]"/>
  <property name="baseEnvironmentProperties">
    <map>
      <entry key="java.naming.security.authentication" value="simple" />
    </map>
  </property>
</bean>
        <bean id="authenticationManager"
                class="org.jasig.cas.authentication.AuthenticationManagerImpl">
                <property name="credentialsToPrincipalResolvers">
                        <list>
                                <bean
                                        class="org.jasig.cas.authentication.principal.UsernamePasswordCredentialsToPrincipalResolver" />
                                <bean
                                        class="org.jasig.cas.authentication.principal.HttpBasedServiceCredentialsToPrincipalResolver" />
                        </list>
                </property>
                <property name="authenticationHandlers">
                        <list>
                                <bean class="org.jasig.cas.authentication.handler.support.HttpBasedServiceCredentialsAuthenticationHandler"
                                        p:httpClient-ref="httpClient" />
                                  <bean class="org.jasig.cas.adaptors.ldap.BindLdapAuthenticationHandler"
      p:filter="uid=%u"
      p:searchBase="ou=People,dc=DOMAINnya,dc=com"
      p:contextSource-ref="contextSource" />
  </list>
 </property>
        </bean>
    <sec:user-service id="userDetailsService">
        <sec:user name="@@THIS SHOULD BE REPLACED@@" password="notused" authorities="ROLE_ADMIN" />
    </sec:user-service>
        <bean id="attributeRepository"
                class="org.jasig.services.persondir.support.StubPersonAttributeDao">
                <property name="backingMap">
                        <map>
                                <entry key="uid" value="uid" />
                                <entry key="eduPersonAffiliation" value="eduPersonAffiliation" />
                                <entry key="groupMembership" value="groupMembership" />
                        </map>
                </property>
        </bean>
        <!--
        Sample, in-memory data store for the ServiceRegistry. A real implementation
        would probably want to replace this with the JPA-backed ServiceRegistry DAO
        The name of this bean should remain "serviceRegistryDao".
         -->
        <bean
                id="serviceRegistryDao"
        class="org.jasig.cas.services.InMemoryServiceRegistryDaoImpl">
        </bean>
    <bean id="auditTrailManager" class="com.github.inspektr.audit.support.Slf4jLoggingAuditTrailManager" />
</beans>
4. kita restart tomcatnya :
/etc/init.d/tomcat6 restart
next.. kita coba install openDS nya..