Radio DNS Server

for https://github.com/KIMB-technologies/Radio-API

See the Docker Image at https://hub.docker.com/r/kimbtechnologies/radio_dns
Github Action build of https://github.com/KIMB-technologies/Radio-DNS-Server

Configuration

The configuration is done using env variables.

• SERVER_BIND (optional, default 0.0.0.0) The IP address the server binds on. 0.0.0.0 binds on all interfaces.
• SERVER_PORT (optional, default 53) The port which is used for the DNS server, should always be the default 53 (unless for testing).
• SERVER_UPSTREAM (optional, default 8.8.8.8) The upstream DNS server, where DNS answers are fetched from
• RADIO_DOMAIN (required, if RADIO_IP not set) The domain where the Radio-API can be found. The DNS server will return the A record of this domain for all queries containing wifiradiofrontier.com.
• RADIO_IP (required, if RADIO_DOMAIN not set) The ip address where the Radio-API can be found. The DNS server will return this IP for all queries containing wifiradiofrontier.com. If RADIO_DOMAIN is set, it will be used. If RADIO_DOMAIN is not set, RADIO_IP will be used!
• ALLOWED_DOMAIN (optional, default all) Normally a DNS resolver will answer all queries from all sources. This can be a security risk, so one should only answer the queries from trusted sources. One can give a list (domain names divided by ,) of domain name here, only queries from the corresponding A records will be answered then. The default value is all which means all sources are trusted. E.g. for testing and usage in local networks. (Normally giving your DynDNS name is right; More domain names lead to a higher response time to queries.)
• TIME_SERVER (optional, default ntp0.fau.de) If the DNS server is queried for time.wifiradiofrontier.com it will answer with the A record of this domain. So one does not have to host an own NTP server at RADIO_DOMAIN. Per default some time server is used.
• ENABLE_UPDATE (optional, default false) Set to true to enable responding to DNS queries for update.wifiradiofrontier.com with the A record of update.wifiradiofrontier.com instead of the ip of Radio-API. (This will allow the radio to do updates. Performing updates is a trade-off between risking changes to the API, that may prevent Radio-API from working, and bug fixes and security implications for the radio's software.)

Besides the domain wifiradiofrontier.com also the domain internetradiofrontier.com is considered as domain to tamper DNS queries for.

Run using the Docker-compose Example!

Notice and Used Libraries

• Alpine Docker Image
• Python 3
• Python DnsLib
• Code inspired from DNSServer
  MIT License, Copyright (c) 2017 Samuel Colvin
• Regex Pattern from Validators used
  MIT License, Copyright (c) 2013-2014 Konsta Vesterinen