Flint 3 strange behaviour IP Adresses

Routers
1

Hi!

today i got my Flint 3 PreOrdered Unit.

And the settings are kind of a bit weird for me. (i come from a synology router)
so i can set my custom pihole dns server, but somehow it doesnt work as it should.
cause my custom dns domain names are not working like before.
it seems as the flint does not use the dns, or better, only sometimes uses the dns server. because somehow i can connect to the internet, and then it stops working.

the other thing i observed is, that my synology nas (which has 2 static ip adresses are behaving also weird in the admin panel of the flint.. (one of the ip adresses constantly changing from the second one to the first one and back.. this is strange.
i have tried static and dynamic ip adresses in the synology settings and also tried to config those 2 nas ip adresses within the flint.. it does not work. probably the way flint identifys the devices is not working.

please help.
best wishes. ere

2

Hello,

  1. May I know where configuration did you set the custom DNS? The custom DNS domain records in the pihole and it as DNS server, right?

  2. Are these two static IP addresses of NAS on the same physical network card? (Like say, there are 2 IPs in the same one MAC address)

4

1.) i have set flint 3 to manual dns, and dns server is the ip of my pihole. Everything worked great with my synology router

System -> DNS -> Mode: manual DNS

It seems that the manual dns settings are not seen by my devices when i connect them to the router. This is kind of strange. I have to manually set the dns server on each device. Hmmm.
This also worked like a charm on my syn router - all automatically transmitted to all my devices.

  1. the problem is solved now, it was the option to enable network acceleration. I turned that off and the problem with the ip adresses of the 2 devices was fixed. Very strange.

What should i do now?

5

Hi,

  1. Oh I see your question. In face if the LAN client DNS server is router gateway, that is correct, the DNS request from LAN is hosting by router, like say:
    Client (DNS server is router gateway 192.168.8.1) -> router (DNS server is pihole) -> DNS server (pihole)

If you require to offer the DNS server (IP) to the client (through dhcp), you can add a dhcp option in Luci:
Luci > Network > Interfaces > Interfaces > lan > Edit >

Bruce_2025-07-02_18-21-07
Bruce_2025-07-02_18-21-07899×472 22.5 KB

  1. After disabling Hardware Acceleration, GL GUI > CLIENTS > 2 IPs of NAS be displayed? If it is enabled, will it display 1 IP?

Are these 2 IPs the same NAS physical network card? Or is one of the IPs from docker, one from physical network card?

If possible, disable and enable the hardware acceleration separately:

  1. Please provide the following screenshots of GL GUI > CLIENTS in PM
  2. Please SSH to the router: apr -a
6
  1. Thank you. Now it is much clearer for me.
  2. There are 2 physical Outputs from my synology nas, so there are 2 cables...
7

Hi,

Thanks, it is clear.

If possible, disable and enable the hardware acceleration separately, in these 2 situations:

  1. Please provide the following screenshots of GL GUI > CLIENTS in PM
  2. Please SSH to the router: arp -a
8

do you mean arp -a??

9

Yes, sorry, edited it.