Run 2 containers on same host?

Help docker
1

afaik

one container can go with

"531:53/tcp"
      - "531:53/udp"
      - "671:67/udp"
      - "801:80/tcp"

second container

"532:53/tcp"
      - "532:53/udp"
      - "672:67/udp"
      - "802:80/tcp"

 nc -zv 192.168 xx 531
Connection to 192.168 xx 531 port [tcp/apertus-ldp] succeeded!

but


dig @192.168.xx -p 531 google.com 

; <<>> DiG 9.16.18 <<>> @192.168.xx -p 531 google.com
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached

from the host machine


dig @0.0.0.0 -p 531 google.com

; <<>> DiG 9.11.5-P4-5.1+deb10u5-Debian <<>> @0.0.0.0 -p 531 google.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1576
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;google.com.			IN	A

;; ANSWER SECTION:
google.com.		145	IN	A	142.250.185.14

;; Query time: 88 msec
;; SERVER: 127.0.0.1#531(0.0.0.0)
;; WHEN: Fri Aug 13 17:12:35 CEST 2021
;; MSG SIZE  rcvd: 55

what i am doing wrong?

2

What are you trying to do here? You have presented some command outputs, but with little context.

3

i try to run 2 pihole containers on the same host

4

You'll have to figure out how to make every client send queries to port 532 instead of port 53 first. Pretty much every single OS is going to use port 53.

5

so then i am better of to put the 2 container on a macvlan and dont care about port

6

You're not going to be able to run 2 DNS servers on the same node. Clients are going to use port 53 and you can't have two services listening on that port.

7

You can run two servers on the same node but have to use private dns (setup similar to GitHub - varunsridharan/pi-hole-android-private-dns: Script to auto-install & configure Android Private DNS For Pi-Hole with custom ports/services). I had to do this for running two diff piholes on 1 openstack container a while back to setup diff dns for my kids vs grownups devices :smiley: