Figure: Sample Standard Deployment Model illustrates a corporate network based on the standard deployment model that most organizations use. In this model, the Symantec Message Filter resides behind a single firewall. Configure your firewall to allow port connections from your Gateway MTA server. This configuration enables the Gateway MTA server to access other servers over the Internet such as the Symantec Global Threat Center and the Symantec LiveUpdate.
Table: Firewall Port Connection Requirements for Standard Deployment Model lists the port numbers that are required for the standard deployment model.
Table: Firewall Port Connection Requirements for Standard Deployment Model