Reverse DNS Lookup not working on Latest version (nslookup)

[saugatadatta]

Details

Pi-hole version is v5.14.1 (Latest: v5.14.1)
AdminLTE version is v5.17 (Latest: v5.17)
FTL version is v5.19.1 (Latest: v5.19.1)
Container tag is: 2022.11

Self DNS Lookup not working on Latest version (nslookup), I have tested the older version, it is working as expected. In the latest version, if you open nslookup in windows, pihole unable to resolve itself. marking as unknown. with the previous version, it is working fine. I am on RPI 4 (Linux RaspberryPi 5.15.76-v8+).

Default Server:  UnKnown
Address:  192.168.0.114
>

How to reproduce the issue

Use the pprevious version pihole/pihole:2022.10

2. docker-compose.yml contents, docker run shell command, or paste a screenshot of any UI based configuration of containers here
3. any additional info to help reproduce

These common fixes didn't work for my issue

• [✓ ] I have tried removing/destroying my container, and re-creating a new container
• I have tried fresh volume data by backing up and moving/removing the old volume data
• [✓ ] I have tried running the stock docker run example(s) in the readme (removing any customizations I added)
• [ ✓] I have tried a newer or older version of Docker Pi-hole (depending what version the issue started in for me)

If the above debugging / fixes revealed any new information note it here.
Add any other debugging steps you've taken or theories on root cause that may help.

[PromoFaux]

Am I missing something here?

C:\Users\adam>nslookup pi.hole
Server:  pi.hole
Address:  192.168.1.253

Name:    pi.hole
Address:  192.168.1.253


C:\Users\adam>nslookup google.com
Server:  pi.hole
Address:  192.168.1.253

Non-authoritative answer:
Name:    google.com
Addresses:  2a00:1450:4009:81f::200e
          142.250.187.206

[saugatadatta]

This is staring from - pihole:2022.11 (docker) - Showing server itself as UnKnown

This was fine till - pihole:2022.10 (docker)

[PromoFaux]

Hmm, there were no docker-specific changes between those versions, but potentially something has changed in FTL:

Best place to start looking pi-hole/FTL@v5.18.2...v5.19

[pluim003]

Same on 2022.11.2 on my Raspberry Pi4, but my Pi2 shows:

Default Server: RaspberryPi2.fritz.box
address: 192.168.178.35

[saugatadatta]

This will clarify more, reverse lookup against self-host IP is not working.

[pluim003]

I get this:

But at least everything is working fine.

[saugatadatta]

I get this:

C:\Users\PluimDW>nslookup Default Server: UnKnown Address: 10.0.0.10

Yup, same issue like me. Tru lookup 10.0.0.10, it will fail.

[PromoFaux]

I'm still unable to repro... How are your containers set up?

C:\Users\Adam>nslookup
Default Server:  pi.hole
Address:  192.168.1.253

> 192.168.1.253
Server:  pi.hole
Address:  192.168.1.253

Name:    pi.hole
Address:  192.168.1.253

[saugatadatta]

I am using this.

#Name : pihole-dhcp-wireguard-socks5
version: "3.5"
services:
  # PiHole with Adguard Home DNS
  pihole:
    container_name: pihole
    #image: "pihole/pihole:2022.10"
    image: "pihole/pihole:latest"
    hostname: pihole.dns
    ports:
      - "53:53/tcp"
      - "53:53/udp"
      - "8008:80/tcp"
    restart: always
    cap_add:
        - NET_ADMIN
        - SYS_NICE
    environment:
      SKIPGRAVITYONBOOT: "1"
      WEBPASSWORD: "MyPassword"
      FTLCONF_LOCAL_IPV4: "192.168.0.114"
      VIRTUAL_HOST:  "pihole.dns"
      PIHOLE_DNS_: "10.14.59.131#553"
      DNSMASQ_LISTENING: "all"
      PIHOLE_DOMAIN: "local"
      DNSMASQ_USER: "root"
      CUSTOM_CACHE_SIZE: "10000"
      DHCP_ACTIVE: "true"
      DHCP_IPv6: "false"
      IPv6: "false"
      DHCP_START: "192.168.0.10"
      DHCP_END: "192.168.0.249"
      DHCP_ROUTER: "192.168.0.1"
      DHCP_LEASETIME: "48"
      DHCP_rapid_commit: "true"
      DNS_BOGUS_PRIV: "true"
      DNS_FQDN_REQUIRED: "true"
    volumes:
      - '/home/pi/pihole-install/pihole/:/etc/pihole/'
      - '/home/pi/pihole-install/dnsmasq.d/:/etc/dnsmasq.d/'
      - '/etc/timezone:/etc/timezone:ro'
      - '/etc/localtime:/etc/localtime:ro'
    networks:
      backend:
        ipv4_address: '172.33.0.100'
      #frontproxy_proxy-tier: {}
      
  # Socks5 with PiHole DNS
  go-socks:
    image: serjs/go-socks5-proxy
    container_name: go-socks5
    hostname: GoSocks5
    #environment:
      #PROXY_USER: "MyPass"
      #PROXY_PASSWORD: "MyPassword"
    volumes:
      - '/etc/timezone:/etc/timezone:ro'
      - '/etc/localtime:/etc/localtime:ro'
    ports:
      - "8080:1080"
    dns:
      - "172.33.0.100"    
    restart: always
    networks:
      backend:
      
# WireGuard VPN with PiHole DNS
  wg-easy:
    environment:
      # Change this to your host's public address
      WG_HOST: "files.fqdn.public"
      WG_PORT: "51820"
      # Optional:
      PASSWORD: "MyPassword"
      WG_DEFAULT_ADDRESS: "10.8.0.x"
      WG_DEFAULT_DNS: "172.33.0.100"
    image: weejewel/wg-easy:latest
    container_name: wireguard
    hostname: wireguard
    volumes:
      - '/home/pi/wireguard:/etc/wireguard'
      - '/etc/timezone:/etc/timezone:ro'
      - '/etc/localtime:/etc/localtime:ro'
    ports:
      - "51820:51820/udp"
      - "51821:51821/tcp"
    restart: unless-stopped
    cap_add:
      - NET_ADMIN
      - SYS_MODULE      
    sysctls:
      - net.ipv4.ip_forward=1
      - net.ipv4.conf.all.src_valid_mark=1
    depends_on:
      - pihole
    networks:
      backend:      
      
  # DHCP Helper
  dhcphelper:
    image: modem7/dhcprelay:latest
    container_name: pihole-dhcp-helper
    hostname: dhcp-helper-svr
    volumes:
      - '/etc/timezone:/etc/timezone:ro'
      - '/etc/localtime:/etc/localtime:ro'
    restart: always
    mem_limit: 20m
    mem_reservation: 6m
    network_mode: "host"
    command: ["-id", "eth0", "-iu", "br_pihole", "172.33.0.100"]
    cap_add:
      - NET_ADMIN
    depends_on:
      pihole:
        condition: service_healthy
networks:
  backend:
    ipam:
      config:
        - subnet: 172.33.0.0/16
    driver_opts:
      com.docker.network.bridge.name: br_pihole
  #frontproxy_proxy-tier:
  # external: true

[saugatadatta]

It looks like after pihole:2022.10, PTR record are not getting created automatically, which is causing this issue.
With pihole:2022.10

With latest version.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Please comment or update this issue or it will be closed in 5 days.

[saugatadatta]

I don't think this issue will resolve anytime soon, please close this.

[PromoFaux]

If it's a genuine bug, then we can keep it open for sure - I've just been unable to reproduce it so far. Let me stick a label on it to keep it open and perhaps we will come across the cause