Contemporary Control Systems Compact Managed Switches Software Manual for Web Browser - Manual (Page 50)

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4.4.11 Configure Port Security
Figure 40 illustrates the Configure Port Security default screen for an 8-port switch
where each port has its security disabled. (The screens for 16- and 24-port models
would function the same — but display more ports.) If security is enabled for a port, no
further MAC addresses are learned for that port and future transmissions through the
port will only succeed if the destination is listed in the address look-up table. Because
static MAC addresses are not learned (aged out of the table), they are not affected by
the applied security. A convenient link to Add Static MAC Addresses is provided at
the bottom of the screen.
Figure 40 — Configure Port Security for 8-port Models
This is a useful feature when connecting to an unknown network — such as connecting
the office network to the control network — and can be used to limit the office devices
that can access the control network.