How do I configure what the URL pi.hole resolves to?

Hi,

I'm running Pi-Hole in a Docker container and I've configured it as DNS. I'd like to use https://pi.hole/admin/login to login into the web interface. It works, when I try it from the host of the Docker container, but it doesn't work from other computers. I've checked with nslookup:

$ nslookup pi.hole
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
Name:	pi.hole
Address: 172.27.0.3

172.27.0.3 is the internal Docker IP address, which can only be accessed from the Docker host.

How can I configure it to something like 192.169.178.123?

I've read about ServerIP in some older threads, but it doesn't seem to work anymore.

My docker-compose.yml:

services:
  pihole:
    container_name: pihole
    image: pihole/pihole:2025.06.2
    ports:
      # DNS Ports
      - "127.0.0.1:53:53/tcp"
      - "127.0.0.1:53:53/udp"
      - "192.168.178.28:53:53/tcp"
      - "192.168.178.28:53:53/udp"
      # Default HTTP Port
      - "127.0.0.1:80:80/tcp"
      - "192.168.178.28:80:80/tcp"
      # Default HTTPs Port. FTL will generate a self-signed certificate
      - "127.0.0.1:443:443/tcp"
      - "192.168.178.28:443:443/tcp"
      # Uncomment the line below if you are using Pi-hole as your DHCP server
      #- "67:67/udp"
      # Uncomment the line below if you are using Pi-hole as your NTP server
      #- "123:123/udp"
    environment:
      # Set the appropriate timezone for your location (https://en.wikipedia.org/wiki/List_of_tz_database_time_zones), e.g:
      TZ: 'Europe/Berlin'
      # Set a password to access the web interface. Not setting one will result in a random password being assigned
      FTLCONF_webserver_api_password: 'correct horse battery staple'
      # If using Docker's default `bridge` network setting the dns listening mode should be set to 'all'
      FTLCONF_dns_listeningMode: 'all'
      ServerIP: 192.168.178.28
    # Volumes store your data between container upgrades
    volumes:
      # For persisting Pi-hole's databases and common configuration file
      - /etc/pihole
      # Uncomment the below if you have custom dnsmasq config files that you want to persist. Not needed for most starting fresh with Pi-hole v6. If you're upgrading from v5 you and have used this directory before, you should keep it enabled for the first v6 container start to allow for a complete migration. It can be removed afterwards. Needs environment variable FTLCONF_misc_etc_dnsmasq_d: 'true'
      #- './etc-dnsmasq.d:/etc/dnsmasq.d'
    cap_add:
      # See https://github.com/pi-hole/docker-pi-hole#note-on-capabilities
      # Required if you are using Pi-hole as your DHCP server, else not needed
      - NET_ADMIN
      # Required if you are using Pi-hole as your NTP client to be able to set the host's system time
      - SYS_TIME
      # Optional, if Pi-hole should get some more processing time
      - SYS_NICE
    restart: unless-stopped

That ServerIP environment variable has been deprecated a long time ago, probably since 2021, and Pi-hole 6 has finally removed it altogether, see also Upgrading from v5.x - Pi-hole documentation.

Instead, you should set FTLCONF_dns_reply_host_IPv4 , probably in conjunction with FTLCONF_dns_reply_host_force4: true .

Yes, I knew that ServerIP was deprecated and going to be removed, but I wasn't able to find the new configuration FTLCONF_dns_reply_host_IPv4.

Thank you. That solved my problem.