Recently I had to create an external trust through a firewall to a domain in a DMZ.  I found an article from Microsoft titled: "How to configure a firewall for domains and trusts”.  After looking at the insane number of ports required, I figured there must be a better way.  So here are the steps I took to create a working trust.   Requirements:  Minimum amount of ports open in firewall.  IPSEC can't be used for various reasons. Pure DNS re... [More]