Recently we’ve been busy implementing a new DNS infrastructure for our resolvers as well as our authoritative servers. We wanted to be ready for future developments like DNSSEC and we wanted to re-new this important part of our infrastructure for a while. This blog-post gives an overview of our new setup.

We’re glad to announce that we’ve published our set of EC2 scripts on GitHub! The repository contains current versions of the code described in our previous two blog posts on EC2.

By default, instances created on Amazon EC2 will have a randomly assigned IPv4 address, which is why we’ve written a script to automatically create DNS entries in PowerDNS for instances managed through EC2.

We, along with some customers, have our authoritative DNS setup with 1 PowerDNS master(which is unreachable over the internet), running poweradmin, and 2 BIND9 slaves(which are ns1 and ns2). This setup works great, but there is a bug in (older versions of) PowerAdmin and one in BIND that together can cause some havoc.