Configure BIND DNS to Answer Active Directory Queries

How to configure BIND DNS to Answer Active Directory Queries ...
http://www.linuxquestions.org/linux/answers/Networking/Configure_BIND_DNS_to_Answer_Active_Directory_Queries

Quick Setup:
If you have an Address Record (A) that identifies your server name like this:

dc1.example.com. A 111.222.333.444

Then your SRV records for this DC would be as follows

_ldap._tcp.example.com. SRV 0 0 389 dc1.example.com.
_kerberos._tcp.example.com. SRV 0 0 88 dc1.example.com.
_ldap._tcp.dc._msdcs.example.com. SRV 0 0 389 dc1.example.com.
_kerberos._tcp.dc._msdcs.example.com. SRV 0 0 88 dc1.example.com.