Leaving it to the Last Second

Thanks to the moon, the earth’s rate of rotation is slowing down. It’s a subtle interaction and the modelling of planetary dynamics predicts that the earth’s rotation should slowing down by an average of 2.3 milliseconds per century. But this is not quite so uniform, as the Economist reported in…


Scoring the DNS Root Server System, Pt 2 – A Sixth Star?

In November I wrote about some simple tests that I had undertaken on the DNS Root nameservers. The tests looked at the way the various servers responded when they presented a UDP DNS response that was larger than 1,280 octets. I awarded each of the name servers up to five…


Scoring the Root Server System

The process of rolling the DNS Root’s Key Signing Key of the DNS has now started. During this process there will be a period where the root zone servers’ response to a DNS query for the DNSKEY resource record of the root zone will grow from the current value of…


RIPE 73

RIPE held its 73rd meeting in Madrid in the last week of October. Here are a few of my takeaways from that meeting. What’s behind all those NATs? We suspect that there are at least 10 billion devices connected to today’s Internet, and we know that less than two billion…


BGP Large Communities

IPv4 addresses are not the only Internet number resource that has effectively run out in recent times. Another pool of Internet numbers under similar consumption pressures has been the numbers that are intended to uniquely identify each network in the Internet’s inter-domain routing space. These are Autonomous System numbers (ASNs).…


The Death of Transit?

I was struck at a recent NANOG meeting just how few presentations looked at the ISP space and the issues relating to ISP operations and how many were looking at the data centre environment. If the topics that we use to talk to each other are any guide, then this…


DNS DDOS

The recent attacks on the DNS infrastructure operated by DYN in October 2016 have generated a lot of comment in recent days. Indeed, it’s not often that the DNS itself has been prominent in the mainstream of news commentary, and in some ways this DNS DDOS prominence is for all…


NANOG 68

NANOG held its 68th meeting in Dallas in October. Here’s what I found memorable and/or noteworthy from this meeting. The meeting opened with Scott Bradner and a history of the IANA. Given that the arrangements with the US Government exercising some level of oversight on the IANA function lapsed on…


A Brief Potted History of the IANA

October 2016 marks a milestone in the story of the Internet. At the start of the month the United States Government let its residual oversight arrangements with ICANN (the Internet Corporation for Assigned Names and Numbers) over the operation of the Internet Assigned Numbers Authority (IANA) lapse. No single government…


DNS OARC 25

DNS OARC is the place to share research, experiences and data primarily concerned with the operation of the DNS in the Internet. Some highlights for me of the most recent meeting, held in October 2016 in Dallas, were: DNS DDOS attacks: This presentation was about using an authoritative server exhaustion…