How to improve the root – Run it locally

Current State of DNS Root Servers The DNS root server system uses IP Anycast.There are 13 root server operators with a total of 1084 instances all over the world. Let’s look at some of the problems in the context of the root server system, Decrease the round trip time to the root servers The round […]

DNS RPZ (Response Policy Zones) – Using DNS as a layer of defence – Part I

Update (06/08/2020) – APNIC has published this post on their blog. Robbie Mitchell from APNIC was of great help in correcting a few things and polishing the article. You can read the Part 1 on the APNIC blog here DNS(Domain Name System) is the crucial & ubiquitous fabric of the Internet.  While on the surface, […]

Junk to the root

DNS root servers are the heart of the DNS infrastructure. Although there are just 13 of them, the actual number comprises of 1084 instances in Anycast operated by 12 independent root server operators. A recent study by ICANN OCTO on Analysis of the Effects of COVID-19-Related Lockdowns on IMRS Traffic shed some light on DNS […]

Chromium based browsers & DNS

While this is not something new, it perhaps has more significance because of the ever increasing market share of more than 60% of Chromium based browsers. Chromium based browsers have a very uncanny method to check if the web browser is sitting behind a captive portal. And if you’re running a recursive resolver in your […]

33,384 open DNS resolvers in India

The Shadowserver Foundation releases and updates a scan report containing results for open resolvers on the Internet. Open resolvers basically respond to any a DNS queries from anyone on the Internet. Open resolvers are bad for the Internet primarily because they are a catalyst in a DNS amplification attack. A Domain Name Server (DNS) Amplification […]