Revocation

April 2026

How have we got to the point where certificates cannot be revoked? More...

NZNOG 2026

April 2026

NZNOG 2026 was held in Christchurch in March 2026. The NZ national community has a long track record of innovation, both in technology and in the underlying investment models for its network infrastructure. Here's a summary of some of the sessions that I found to be of interest. More...

The Last Time

March 2026

It's fading from our collective memory, but almost thirty years ago the global IT industry was gripped by Y2K fever. Another version of the counter rollover problem is coming back in 2036, 2038 and 2040. Hopefully we will avoid a large amount of hysteria this time around! More...

The Why and What of the CIDR Report

March 2026

For some time, I have been looking after a routing analysis report called the "CIDR Report". Here I'd like to explain the reasons for this report, and what is in the report and share some thoughts as to its usefulness today to the Internet routing community. More...

Revisiting Time

March 2026

Today's digital world relies on a consistent view of the time. We achieve this with the Network Time Protocol (NTP). Given the extent of our reliance on an accurate time base it is surprising that the NTP protocol has no security mechanisms to protect the integrity of time dissemination. Lets look at time, NTP, and the recent efforts to add authenticity and temper detection to this protocol. More...

Measuring DNS over IPv6

February 2026

Is the DNS ready for IPv6? Are we ready to deploy IPv6-only Authoritative Nameservers? Let's measure the Internet to find out the answer! More...

NANOG 96

February 2026

NANOG 96 was held in February 2026 at San Francisco. Here are my impressions on some of the presentations that were made at that meeting.More...

From the Stupid DNS Tricks Department: ipasn.net

February 2026

It's quite surprising what you can do in the DNS when you break out of the conventional constraints and adopt a more flexible view of the DNS query/response model. More...

IP Address to Organisation Name Map

January 2026

The whois query tool is useful to identify which organisation holds an IP Address Prefix or an Autonomous System Number, but not so useful in performing the reverse query, listing all IP Addresses and Autonomous System Numbers held by an organisation. Here is a resource that can help with such queries. More...

IP Addresses through 2025

January 2026

It's time for another annual roundup from the world of IP addresses. Let’s see what has changed in the past 12 months in addressing the Internet and look at how IP address allocation information can inform us of the changing nature of the network itself. More...

BGP Updates in 2025

January 2026

The first part of this annual report on BGP for the year 2024 looked at the size of the routing table and some projections of table growth for both IPv4 and IPv6. However, the scalability of BGP as the Internet’s routing protocol is not just dependant on the number of prefixes carried in the routing table. BGP protocol behaviour in the form of dynamic routing updates are also part of this story. This second part of this report looks at the profile of BGP updates across 2023 to assess whether the stability of the routing system, as measured by the level of BGP update activity, is changing.More...

BGP in 2025

January 2026

At the start of each year, I’ve been reporting on the behaviour of the Internet’s inter-domain routing system over the previous 12 months, looking in some detail at some metrics from the routing system that can show the essential shape and behaviour of the underlying interconnection fabric of the Internet.More...

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