!!! Overview
This is a short summary, for the full details see: [Active Directory and Active Directory Domain Services Port Requirements|http://technet.microsoft.com/en-us/library/dd772723%28WS.10%29.aspx|target='_blank']

* 379: LDAP – Site Replication Service
* 389: LDAP
* 636: LDAP (SSL)
* 3268: LDAP – Global Catalog
* 3269: LDAP (SSL) – Global Catalog (SSL)

!! More Information
There might be more information for this subject on one of the following:
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