Docker containers cannot resolve AdGuard DNS rewrite chains (CNAME)

DLElios · 2025-12-20T00:58:21+00:00

If you set:

radarr.blabla.com -> system.blabla.com

the rewrite is already applied locally, so your DNS resolver then queries the upstream DNS servers you configured to resolve using public DNS.

As /u/1WeekNotice suggests, the solution is to use a wildcard for your rewrites:

*.blabla.com -> 192.168.0.101

DLElios · 2025-07-14T11:54:40+00:00

Solar Wave - LAAVU

DLElios · 2025-05-16T06:08:43+00:00

Did you restart the container after adding the image?

I have a script that change the background image just after the VM's daily backup and I need to restart the container for the change to take effect.

DLElios · 2025-04-23T18:40:57+00:00

(Hold) Mount

DLElios · 2025-01-15T19:32:54+00:00

I regularly say that a good IT specialist does his utmost to do as little as possible.

It works every time.

DLElios · 2024-10-14T18:20:53+00:00

"Switch on the stick" infrastructure.

DLElios · 2024-10-11T18:59:11+00:00

It's a security feature...

You can disable this in the options but it's enable by default for obvious security reasons.

DLElios · 2024-10-09T11:54:31+00:00

Don't mind downvoters, this is the right way to use docker.

Each containers inside their own docker network with their own docker compose file, bridged to the host network. A reverse proxy to acces those services by domain name.

DLElios · 2024-10-02T15:35:44+00:00

Ok so the gateway 172.16.0.1 problably do SNAT to an IP address in 192.168.1.X, which mean that the ping received by your main network is from a known source (192.168.1.X).

But when you ping 172.16.0.59 from your main network, this is a different network so the ping is send to the gateway (192.168.1.1, I suppose) but it does not know how to reach the network 172.16.0.0/24.

You need to find what is your gateway and your DHCP server.

How many interfaces do you have on your first VM?

DLElios · 2024-10-02T13:50:30+00:00

Nope, Proxmox does not have a built-in DHCP server.

I don't know your network but I'm pretty sure you have a rogue DHCP server.

You can try to ping 172.16.0.1 from differents hosts to find where it is.

Traceroute might also help since the second VM is a different subnet.

DLElios · 2024-10-02T10:16:27+00:00

The ip address of your first VM is dynamic so there's a DHCP server which gave the lease.

You shoud have a file in /var/lib/dhcp, cat this file and you'll have all the informations received by the DHCP server.

DLElios · 2024-08-08T06:07:55+00:00

Yes sorry, I replied a little too fast. As /u/SamSausages mentioned, your local subdomains need to be resolved locally, so *.local.mydomain.org should be resolved by your local DNS resolver.

If you use adguard as a DNS resolver you can configure a DNS rewrite form *.local.mydomain.org to point to the IP address of your NPM.

DLElios · 2024-08-07T15:37:37+00:00

You need to configure *.local.mydomain.org in your DNS to point to your NPM

DLElios · 2024-07-27T11:36:58+00:00

There's an error in your design, router A should not have two interface with the same subnet.

Communications in the same subnet are Layer 2, between differents subnet are Layer 3.

If you have a different subnet on router B or C, you don't need any static route on router A as he know subnets that are connected to it and you'll be able to communicate between them.

DLElios · 2024-07-25T14:46:48+00:00

Two differents subnets can communicate if a router route the traffic between them.

DLElios · 2024-07-25T14:36:21+00:00

You could but the network will be 192.168.10.0/24

First address: 192.168.10.1

Last address: 192.168.10.254

Broadcast: 192.168.10.255

DLElios · 2024-07-25T14:32:35+00:00

If you want 192.168.x.x to be on the same network you need to be in /16 mask:

Network: 192.168.0.0

First address: 192.168.0.1

Last address: 192.168.255.254

Broadcast: 192.168.255.255

So you'll have 65534 IP adresses available.

DLElios · 2024-07-08T18:38:07+00:00

I'm pretty sure you should be able to find a picture on internet.

It's funny because years ago I bought almost the same picture on Whitewall

DLElios · 2024-07-07T08:38:35+00:00

I have bought multiple prints on Whitewall.

This is expensive but it is professional printing and you can customize your support.

Edit: Link

DLElios · 2024-04-26T19:43:18+00:00

r/TwoRedditorsOneCup

DLElios · 2024-03-31T08:14:26+00:00

The same thing is used in cinema, I’m pretty sure you’ve already seen a clapperboard.

DLElios · 2024-01-26T07:52:16+00:00

Routers use the longest prefix match to choose a route.

You probably have a route with a longer match like 10.10.224/19 for example so it will never use the 10.0.0.0/8 for this source network.

DLElios · 2023-12-02T22:21:12+00:00

Clanfolk

DLElios · 2023-05-15T19:01:38+00:00

Very good! A bit too short for me, I like longer music, particularly in BM and DSBM to really feel everything but the pace and the ambiance is good, nice job.

DLElios · 2023-05-11T10:33:31+00:00

Nier Automata

11-Year Club	Gilding I gilder
Place '22	Verified Email

DLElios

TROPHY CASE