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Here's s good article: AD Replication over Firewalls by Steve Riley,
Consultant at Microsoft Telecommunications Practice.
http://www.microsoft.com/SERVICEPROVIDERS/columns/config_i psec_p63623.asp
Useful URLs:
A List of the Windows 2000 Domain Controller Default Ports:
ID=KB;EN-US;Q289241
Q179442 - How to Configure a Firewall for Domains and Trusts.
ID=KB;EN-US;Q179442
Q224196 - Restricting AD Replication Traffice to a Specific Port.
http://support.microsoft.com/directory/article.asp? ID=KB;EN-US;Q224196
Regards,
/Jimmy
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Jimmy Andersson, Q Advice AB
Microsoft MVP - Active Directory
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