The vulnerability of Active Directory to attacks like denial of service can have negative impacts to the way a business operates. This is exactly why it is always important to have LDAP firewall, which is known to keep such attacks from occurring into your LDAP directories, databases and an Active Directory. But rather than using LDAP firewall alone, you may want to consider employing software that can work not only as LDAP firewall but proxy at the same time. It can also provide you with what you need to acquire merged or consolidated views of data that come from multiple data sources.