Hi

I noticed that lately Unraid got really slow when checking for updates (plugins, dockers,...). I tracked the issue down to DNS. For some reason Unraid can't reach my Pi-hole Docker anymore (this used to work and I can not remember changing related settings). ping does not work either.

• Pi-hole is running in a docker on the Unraid server (I know it's better to do this on another machine but for now I don't have one). Unraid is configure to use Pi-Hole as primary DNS and my DSL-Router as secondary.

• all my Dockers run on the custom bridge br0

• all my Dockers use IPVLAN and have a static IP configured 192.168.1.x/24

• I have "Host access to custom networks" enable in my Docker settings

What am I missing? Why does this "suddenly" not work anymore?

Of course I could re-configure Unraid to use my DSL-Router as DNS but then I would loose all my local DNS records.

In about a month I should finally get a managed Switch and a Mini-PC with 2x 2.5GE and I can hopefully setup a FW, separate my network into zones and also move Pi-hole to the Mini-PC and disable Host access on Unraid. In the meantime I would like to understand what is going on and how I can fix it.

Thank you very much.

are you using tail scall and set dns = true?

this breaks unraids dns... as you told Tailscle to overwrite the host DNS system.

Please post a diag file

37 minutes ago, bmartino1 said:

are you using tail scall and set dns = true?

this breaks unraids dns... as you told Tailscle to overwrite the host DNS system.

Please post a diag file

No, I'm not yet using tailscale. I plan to use it though once I have the FW and managed switches up and running. But at this point Pi-Hole will be on the Mini-PC too.

you may have to many IP suing the same mac address use macvlan:
Some Docker networking Info when to use what docker network

Changing to macvlan solved the issue. Thank you very much.

I have to read up on the different types of docker networks. I remember networkchuck also has a pretty good video about this topic. Well with the managed switch I will anyway have to read up on how to create additional networks on Unraid and how to assign VLANs to them. I want to have at least 5 different zones (guests, iot, trusted-clients, a danger-zone (port-forwarding form Inet e.g. for torrent) and one more for all the services I want to expose via tailscale).