<div>
<div class="content wysiwyg-content">
We operate in a W2K3 AD domain. &nbsp;The domain has two DCs replicating one another. &nbsp;The Primary DC is W2K3 R2 SP-2, and the alternate DC is W2K3, SP-2. &nbsp;If I enable the firewall on either of these DCs, FRS will not replicating (Event ID:13508), and clients cannot resolve DNS or possibly RPC connection problems. &nbsp;I can say that if the firewalls are disabled these problems go away. &nbsp;I followed the steps as per article KB555381 (How to configure Windows Server 2003 SP1 Firewall for a Domain Controller) on both DCs and the communications problems still exist. &nbsp;I modified the registry and opened all the suggested ports, enabled the firewalls and rebooted both DCs. &nbsp;After the reboot and the firewalls enabled the same problems exist. &nbsp;At this point I disabled the firewalls until we can figure out how to correct the problem. &nbsp;Any feedback would be appreciated. &nbsp;
</div>
</div>


We operate in a W2K3 AD domain.  The domain has two DCs replicating one another.  The Primary DC is W2K3 R2 SP-2, and the alternate DC is W2K3, SP-2.  If I enable the firewall on either of these DCs, FRS will not replicating (Event ID:13508), and clients cannot resolve DNS or possibly RPC connection problems.  I can say that if the firewalls are disabled these problems go away.  I followed the steps as per article KB555381 (How to configure Windows Server 2003 SP1 Firewall for a Domain Controller) on both DCs and the communications problems still exist.  I modified the registry and opened all the suggested ports, enabled the firewalls and rebooted both DCs.  After the reboot and the firewalls enabled the same problems exist.  At this point I disabled the firewalls until we can figure out how to correct the problem.  Any feedback would be appreciated.  

Windows 2003 Server Domain Controller Firewall Enabled Communication Problems.

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.

Microsoft Server OS

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.