Symantec 10765539 - Mail Security For SMTP, Руководство по планированию

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21 Planning your deployment
Deployment models
Considerations
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Some organizations prefer to have secure gateways with no other services
running. In these environments, all other services run behind the first
gateway layer.
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Some smaller organizations do not have dedicated gateway servers or a
gateway layer. Instead, they deploy gateway servers and internal mail
servers on the same computers.
■
Symantec Mail Security for SMTP cannot be installed on the server running
Exchange.
Multi-tier gateway deployment
Note: This model may be implemented with one or more Scanner hosts.
The following figure shows Symantec Mail Security for SMTP in a multi-tier
gateway deployment, with multiple Scanners in the DMZ and a Control Center
behind a second firewall.
Figure 2-2
Multi-tier gateway deployment
Advantages
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This configuration meets a common security audit requirement in that all
data stores are in the second tier, including the Control Center and Spam
Quarantine databases.
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Inbound traffic may be load balanced across multiple scanners with this
model.