Does Fing Desktop work with CUJO?

Does Fing Desktop work with CUJO? I want block unwanted devices trying to use my network
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  • RobinRobin Administrator, Fing Team Posts: 4,206
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    admin
    Hi @RobMit1

    Fingbox and Cujo on same network may produce several false alerts as they both use same working principle. The way the Fingbox works is through ARP poisoning and DNS Spoofing.  So what is happening is that when you block a single device, the computer DHCP address and DNS entries gets changed and pointed to the Fingbox.  So this device is not blocked from getting to the internet or internal resources.  
     
    For more information on ARP poisoning and DNS Spoofing see the following links:  
    Blocking is done by DNS/Blocking Spoofing.  
    https://en.wikipedia.org/wiki/DNS_blocking  
     
    The Fingbox/App work to pause things by a process called ARP poisoning/Blocking.  
    https://en.wikipedia.org/wiki/IP_address_spoofing  
      

    The CUJO also uses ARP spoofing to become the gateway for the network in a way that triggers Fingbox's alarms. CUJO may use MAC randomization which means that the MAC address of the computer can change and it will simply change MAC address and get a new IP address, thus producing alert from Fingbox. 

    As we have investigated and found out that CUJO and Firebox can work side by side. Some of the features like Internet pause/ block might not work if CUJO is installed. You can try to put CUJO in passive mode and then connect Fingbox with router actively. This network set up should be able to maintain the network. 


    Robin (Admin at Fing)
    Getting Started? Please refer to Community guidelines & Community User Guides("Helping Hand"). HAPPY POSTING!!!
  • RobinRobin Administrator, Fing Team Posts: 4,206
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    admin
    Tagging @Marc @Pixel for the useful information. Thanks


    Robin (Admin at Fing)
    Getting Started? Please refer to Community guidelines & Community User Guides("Helping Hand"). HAPPY POSTING!!!
    Pixel
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