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Help, can't resolve Adguard DNS rewrites on my Proxmox server (zerobytes.monster)

submitted 1 year ago by [email protected] to c/[email protected]

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The original was posted on /r/homelab by /u/MicroserviceEngineer on 2024-01-23 14:28:36+00:00.

I'm at my wit's end and have no idea how I can debug this issue any further. I have a home setup that involves the following:

a Raspberry Pi with home assistant and the Adguard plugin with DHCP for IPv4
- Core 2024.1.5
- Supervisor 2023.12.1
- Operating System 11.4
- Frontend 20240104.0
- Adguard plugin 5.0.2
my ISP's (Ziggo) default router (IPv4 and IPv6) with its IPv6 DHCP with DNS set to the Pi's IPv6.
a laptop doing duty as a proxmox server.

All devices have been assigned static IPv4 and IPv6 addresses. I noticed that my Proxmox laptop wasn't resolving my Adguard DNS rewrites while my workstation was. I've tried both with the GUI and the free form rewrites rules.

DNS Rewrites in Adguard GUI

I started to dig into it further. From my workstation I get a successful reply:

dig ..house                                                                                                                                                                                                                                                                                             

; &lt;&lt;>> DiG 9.18.12-0ubuntu0.22.04.3-Ubuntu &lt;&lt;>> ..house                                                                                                                                                                                                                                                   
;; global options: +cmd                                                                                                                                                                                                                                                                                                    
;; Got answer:                                                                                                                                                                                                                                                                                                             
;; ->>HEADER&lt;&lt;- opcode: QUERY, status: NOERROR, id: 55882                                                                                                                                                                                                                                                                  
;; flags: qr rd ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0                                                                                                                                                                                                                                                       
;; WARNING: recursion requested but not available                                                                                                                                                                                                                                                                          

;; QUESTION SECTION:                                                                                                                                                                                                                                                                                                       
;..house.      IN      A                                                                                                                                                                                                                                                                                  

;; ANSWER SECTION:                                                                                                                                                                                                                                                                                                         
..house. 0     IN      A       192.168..                                                                                                                                                                                                                                                             

;; Query time: 10 msec                                                                                                                                                                                                                                                                                                     
;; SERVER: #53(172.29.208.1) (UDP)                                                                                                                                                                                                                                                                             
;; WHEN: Tue Jan 23 15:17:18 CET 2024                                                                                                                                                                                                                                                                                      
;; MSG SIZE  rcvd: 82

Now when I try to do the same on my proxmox machine:

dig ..house 

; &lt;&lt;>> DiG 9.16.33-Debian &lt;&lt;>> ..house
;; global options: +cmd
;; connection timed out; no servers could be reached

Now the strange part is that when I do the same query for the AAAA record I get a reply from the expected nameserver:

dig ..house AAAA

; &lt;&lt;>> DiG 9.16.33-Debian &lt;&lt;>> ..house AAAA
;; global options: +cmd
;; Got answer:
;; ->>HEADER&lt;&lt;- opcode: QUERY, status: NOERROR, id: 61659
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;..house.      IN      AAAA

;; Query time: 4 msec
;; SERVER: 192.168.178.57#53(192.168.178.57)
;; WHEN: Tue Jan 23 15:22:13 CET 2024
;; MSG SIZE  rcvd: 42

When I look at the query logs both queries successfully reach the nameserver and are replied to appropriately with no errors:

I'm completely at a loss and have already lost days trying to debug this issue. Who can help me out?

Edit: there's no visible error logs in the HA Pi's Adguard addon.

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