Belkin NIAP PP4.0 Secure KVM and KM Administrator Advanced Configurations – How to View Approved and Blocked CAC Port Devices

Last updated: 3/27/2025

Certain models of Belkin Secure KVMs feature a Dedicated Peripheral Port, labeled CAC on the KVM. This is a one-way, slow-speed, USB 1.1 port designed for USB authentication devices. The CAC port, by default, is switchable and shared amongst all the computers connected to your KVM or can be locked to a specific port. Belkin KVMs leave the factory pre-programmed to accept the most common CAC reader devices, but additional devices can be added through the Administration Configuration Terminal.

Applicable to:

 

  • F1DN102KVM-UN-4
  • F1DN104KVM-UN-4
  • F1DN108KVM-UN-4
  • F1DN116KVM-UN-4
  • F1DN202KVM-UN-4
  • F1DN204KVM-UN-4
  • F1DN208KVM-UN-4
  • F1DN102KVM-DC-4
  • F1DN202KVM-DC-4
  • F1DN104KVM-DC-4
  • F1DN204KVM-DC-4
  • F1DN108KVM-DC-4
  • F1DN208KVM-DC-4
  • F1DN104KVMDCU-4
  • F1DN204KVMDCU-4
  • F1DN104MKVMDC-4
  • F1DN108MKVMDC-4
  • F1DN104MVKVMDC4
  • F1DN108MVKVMDC4

 



Viewing Approved and Blocked CAC port devices

Your SKVM keeps a list of devices that are allowed to or blocked from connecting to the SKVM. This can be useful when troubleshooting or for auditing purposes and is done through the Administration Configuration Terminal.

 

1. Log in to the Administration Configuration Terminal.

2. Use the top row of the number keys to access Menu 2 – configure dpp.
 
 
sf336638-001_en_v1.png
 

3. Use the top row of number keys to view a list:
 
sf336638-002_en_v1.png
 
 
  • Press 4 - show currently approved device
  • Press 5 - show currently blocked device


Sample output - approved devices:

[dpp-allow] vid ffff-ffff-ffff,cls ff-ff-ff,msk ffff

Sample output - blocked devices:

[dpp-block] vid ffff-ffff-ffff,cls ff-ff-ff,msk ffff

 

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