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Technical development often comes in short intense bursts, where a relatively stable technology becomes the subject of intense revision and evolution. The DNS is a classic example here. For many years this name resolution protocol just quietly toiled away. The protocol wasn’t all that secure, and it wasn’t totally reliable,…
The architecture of the Internet took a highly radical step in the evolution of wide area communications protocols. Rather than placing much of the functionality into the network infrastructure and using network functions to emulate reliable edge-to-edge circuitry, the Internet Protocol used a network service model that was minimal and…
The first part of this report on the handling of large DNS responses looked at the behaviour of the DNS, and the interaction between recursive resolvers and authoritative name servers in particular and examined what happens when the DNS response is around the Internet’s de facto MTU size of 1,500…
We’ve written a number of times about the issues of managing packet sizes in packet-switched networks. It’s an interesting space that is an essential part of the design of packet-switched networks, and a space where we still seem to be searching for a robust design. This work has been prompted…
We used to think of computer networks as being constructed using two fundamental common infrastructure components: names and addresses. Every connected device had a stable protocol address to allow all other devices to initiate a communication transaction with this device by addressing a data packet too this protocol address. And…
The DNS is a remarkably simple system. You send it queries and you get back answers. Within the system you see exactly the same simplicity: The DNS resolver that receives your query may not know the answer, so it, in turn, will send queries deeper into the system and collects…
This article was first written in August 2019, and it ended with the comment: “It’s likely that we will return to this measurement of the use of Qname minimisation in a year or so to see if anything has changed from the picture today.” A year has passed and it’s…
Much the Internet operations and research world has gone virtual for 2020. Meetings continue to take place and while the level of interaction in these meetings is different, many of these meetings continue to engender useful conversations. In my case I’m interested in the infrastructure that binds the network together…
These days it seems that whenever we start to talk about the DNS the conversation immediately swings around to the subject of DNS over HTTPS (DoH) and the various implications of this technology in terms of changes in the way the DNS is used. It’s true that DoH is a…
I was on a panel at the recent Registration Operations Workshop on the topic of DNS Privacy and Encryption. The question I found myself asking was: “What has DNS privacy to do with registration operations?” The registration function is part of the process of public attestation relating to some form…
