NetIQ Corporation does not support managed agents separated from the central computer by a firewall or other device or configuration that can impede RPC or NetBIOS functionality.
When monitoring computers behind a firewall, NetIQ Corporation recommends manually installing unmanaged agents on your remote computers. For more information about manually installing unmanaged Windows agents, see Section 4.1, Understanding Unmanaged Windows Agent Installation.
To install Sentinel Agent Manager in a firewall environment, you must configure all firewalls to allow the domains in which you want to install Sentinel Agent Manager components to trust one another. For more information about configuring a firewall to allow trust, see the Microsoft Knowledge Base Article 179442.