Directory Services White Papers

Active Directory Replication Over Firewalls

• Tags:
• directory services,
• environments,
• directory,
• distributed

Overview Firewalls present two difficulties when deploying a distributed Active Directory (AD) directory service architecture - initially promoting a server to a domain controller, and replicating traffic between domain controllers. Active Directory relies on Remote Procedure Call (RPC) for replication between domain controllers. (Simple Mail Transfer Protocol [SMTP] can be used in certain situations - schema, configuration, and global catalog replication, but not domain naming context - limiting its usefulness.) Getting replication to function properly in environments where a directory forest is distributed among internal, perimeter networks and external (that is, Internet-facing) networks can be challenging. This white paper explains how to get replication to function properly in these environments.

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