Visara SSL1000 - Manual (Page 27)

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Chapter 3. SSL1000 Overview
Trust Only the Data Center Staff
Only the data center PCs have a direct path. Office PCs and remote users
must use encryption. At the administrator's discretion, data center staff could
have unencrypted access from their offices, but that access must be through
the SSL1000. This topology allows no Internet access from the Data Center.