WildDNS

A tiny dockerized DNS server which always returns the same IP(s).

Quickstart

$ docker run -d --name wilddns -p 53:53/udp mazzolino/wilddns --log 192.168.1.230 192.168.1.231 192.168.1.232

Testing:

$ dig +short my.example.host @localhost
192.168.1.230
192.168.1.231
192.168.1.232
$ dig +short another.example.host @localhost
192.168.1.231
192.168.1.232
192.168.1.230

Details

WildDNS will answer requests for A records only. It will always return all IP addresses given on the commandline, in random order.

When given the --log flag, every matching request will be logged to STDOUT. Example:

2017-06-19_20:08:41     172.17.0.1      my.example.host.
2017-06-19_20:08:53     172.17.0.1      another.example.host.

Development

Prerequisites

The following tools have to be installed in order to build this:

• Docker
• The dapper binary needs to be available in your PATH.

Building

Run make. It builds a docker image mazzolino/wilddns by default.

Available build targets:

• wilddns: build static wilddns binary
• image (default): build Docker image. Optionally set image name via make IMAGE=my-image-name
• push: push Docker image to Docker registry hub

Credits

The code structure was adopted from microdns. Thanks!