devilbox/docs/intermediate/setup-auto-dns.rst

Setup Auto DNS

If you don't want to add host records manually for every project, you can also use the bundled DNS server and use it's DNS catch-all feature to have all DNS records automatically available.

Important

By default, the DNS server is set to listen on 1053 to avoid port collisions during startup. You need to change it to 53 in .env via env_host_port_bind.

Table of Contents

local

Native Docker

The webserver as well as the DNS server must be available on 127.0.0.1 or on all interfaces on 0.0.0.0. Additionally the DNS server port must be set to 53 (it is not by default).

• Ensure env_local_listen_addr is set accordingly
• Ensure env_host_port_bind is set accordingly
• No other DNS resolver should listen on 127.0.0.1:53

Prerequisites

First ensure that env_local_listen_addr is either empty or listening on 127.0.0.1.

host> cd path/to/devilbox
host> vi .env
LOCAL_LISTEN_ADDR=

Then you need to ensure that env_host_port_bind is set to 53.

host> cd path/to/devilbox
host> vi .env
HOST_PORT_BIND=53

Before starting up the Devilbox, ensure that port 53 is not already used on 127.0.0.1.

host> netstat -an | grep -E 'LISTEN\s*$'
tcp        0      0 127.0.0.1:53            0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:43477         0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:50267         0.0.0.0:*               LISTEN

If you see port 53 already being used as in the above example, ensure to stop any DNS resolver, otherwise it does not work.

The output should look like this (It is only important that there is no :53.

host> netstat -an | grep -E 'LISTEN\s*$'
tcp        0      0 127.0.0.1:43477         0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:50267         0.0.0.0:*               LISTEN

Docker on Linux

Your DNS server IP address is 127.0.0.1.

howto_add_custom_dns_server_on_linux

Docker for Mac

Your DNS server IP address is 127.0.0.1.

howto_add_custom_dns_server_on_mac

Docker for Windows

Your DNS server IP address is 127.0.0.1.

howto_add_custom_dns_server_on_win

Docker Toolbox

howto_docker_toolbox_and_the_devilbox

This part applies equally for Docker Toolbox on MacOS and on Windows:

Prerequisites

• env_local_listen_addr must be empty in order to listen on all interfaces
• env_host_port_bind must be set to 53

You need to create three port-forwards to make the DNS and web server available on your host os:

• Port 80 from the Docker Toolbox virtual machine must be port-forwarded to 127.0.0.1:80 on your host os
• Port 443 from the Docker Toolbox virtual machine must be port-forwarded to 127.0.0.1:443 on your host os
• Port 53 from the Docker Toolbox virtual machine must be port-forwarded to 127.0.0.1:53 on your host os

Assuming the Docker Toolbox IP is 192.168.99.100 your forwards must be as follows:

From IP	From port	To IP	To port
192.168.99.100	53	127.0.0.1	53
192.168.99.100	80	127.0.0.1	80
192.168.99.100	443	127.0.0.1	443

* howto_ssh_port_forward_from_docker_toolbox_to_host * howto_find_docker_toolbox_ip_address

Actual setup

Important

After settings this up, follow the above guides for Docker for Mac or Docker for Windows to finish the setup.