40
TLX48 Matrix Switch Product Manual
thinklogical
Rev. B, April, 2016
Secure Application Examples
The Diagram on page 41 shows the TLX48 Matrix Switch in a secure application.
The highly secure
components are described as the Red Network and the other, lower security components are described
as the Black Network.
The Red Network, containing the computers (sources), is shown in a physically secure
environment along with the TLX Matrix Switch, the computer server used to manage the Switch, and the
Network Hub. The Network Hub is a dedicated network used only to connect the TLX Switch to the computer
server. This dedicated network does not connect to any other components and does not extend beyond the
physically secure environment. The dedicated network connection may be replaced by a direct serial
connection (RS-232) between the TLX Switch and the computer server.
The TLX Matrix Switch can be configured to prevent accidental connection from the Red Network to
the Black Network using the Restricted Switching feature.
For example, the TLX Matrix Switch Network
Diagram should be configured with the following csv file:
Direction
Number
Priority
I
1
2
I
2
2
O
2
2
I
42
2
O
41
2
O
42
2
I
5
1
O
5
1
I
45
1
O
45
1
The following connection rules apply:
SOURCE 2 can be connected only to DESTINATION 2 and
SOURCE 1 can be connected to both DESTINATION 1 and DESTINATION 2.
Note: The TLX Matrix Switch
and the computer server used to manage the Switch must be
protected according to the highest security classification of any component in the entire
network application.
Note: The optical connections and DESTINATION receiver designated as Red Network must be
physically secure.
Note: When using a Back-up Controller configuration, both controllers must have the same
Partition Table file(s) to maintain the security of the system.
The configuration of the TLX Matrix Switch should be reviewed regularly to ensure that it
continues to meet organizational security policies concerning:
Changes in the TLX Matrix Switch configuration
Changes in the organizational security policy
Changes in the threats presented from non-trusted network interfaces
Changes in the administration, operation staff or the physical environment of the TLX Matrix Switch
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