Fing Application on Mac OS X Big Sur issues - DHCP and Device info

RickB
RickB Member Posts: 5
First Anniversary First Comment Photogenic
edited July 8, 2021 in Fing Desktop #1
I am seeing two issues with my Fing application recently.  The first issue is that it is reporting that my DBHCP is not healthy in my LAN.  I have no issue with powering any devices done and then back up and successfully get an IP address (router is a UDM Pro and provides the IP address when requested).  The second issue that I am seeing is that the Fing app will not retain any device changes I make such as renaming a device, where it is located and whether I own it.  Each time I open the app, it shows the "?" for every device in my LAN (after I changed it in the previous session to say that I do own the device).  My Fing Box is running firmware 1.15.2 and my Fing app version is 2.6.0
Cheers,
Richard
Fortune favours the brave!

Answers

  • Robin_Ex_Fing
    Robin_Ex_Fing Member Posts: 5,293
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    Hi @RickB

    Do you have any Wifi repeater on your network? 

     We have seen that if user has repeater (Wifi Range Extender) and it is configured with a DHCP server  (Networks > DHCP Settings ) as "AUTO" then if you disable the DHCP Server, you must have another DHCP server within your network or else you must configure the IP address of the computer manually. 

    If you find a router or repeater with DHCP Server active or auto-configured, try to disable it and it will resolve the issue. 

    Robin (Admin at Fing)
    Getting Started? Please refer to Community guidelines & Community User Guides. HAPPY POSTING!!!
  • RickB
    RickB Member Posts: 5
    First Anniversary First Comment Photogenic
    Hi Robin,
    I have a UDM Pro that provides the DHCP Service to my network.  The access points are all Ubiquiti APs and are configured as a mesh network and they use DHCP to get their IP address from the UDM Pro.  Devices such as my iPhone, Nest Thermostats, Apple Watch are having no issue with connecting to the network and getting an IP address from the UDM Pro.  I have checked my network and the only device that is acting as a DHCP server is the UDM Pro.
    I have run Wireshark to monitor my network and the only device that I can see responding to provide a DHCP address is my UDM Pro.  The other issue that I have noticed with the DHCP is that the DHCP Discovery can be started but it never completes.  When I look at Wireshark captures, it shows all of the ARP commands going out to determine who is on the addresses from 1 to 255 in my LAN.
    Until the end of June, Fing did not see any DHCP issues (the UDM Pro was installed in my network in April when my pfSense firewall hardware stopped working).

    Cheers,
    Richard
    Fortune favours the brave!
  • Robin_Ex_Fing
    Robin_Ex_Fing Member Posts: 5,293
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    @RickB
    Are you still using pfsense on your network? Is there any possibility you can disable UDM pro and then reply on your router for DHCP service and then check if the issue persists?
    Robin (Admin at Fing)
    Getting Started? Please refer to Community guidelines & Community User Guides. HAPPY POSTING!!!