More Leaky Routes

Most of the time, mostly everywhere, most of the Internet appears to work just fine. Indeed, it seems to work just fine enough to the point that that when it goes wrong in a significant way then it seems to be fodder for headlines in the industry press.


An Update on IPv6

In the coming weeks another Regional Internet Registry will reach into its inventory of available IPv4 addresses to hand out and it will find that there is nothing left. This is by no means a surprise, and the depletion of IPv4 addresses in the Internet could be seen as one…


Apple and IPv6

It’s Apple’s Developers Conference time again, and in amongst the various announcements was week, in the “Platforms Status of the Union” presentation was the mention of IPv6. Sebastien Marineau, Apple’s VP of Core OS told the conference that as far as IPv4 addresses are concerned exhaustion “is finally here”, noting…


Multipath TCP

The Transmission Control Protocol (TCP) is a core protocol of the Internet networking protocol suite. This protocol transforms the underlying unreliable datagram delivery service provided by the IP protocol into a reliable data stream protocol. This protocol was undoubtedly the single greatest transformative moment in the evolution of computer networks.…


NANOG 64

The North American Network Operator’s Group held its 64th Meeting in San Francisco in early June. Here’s my impressions of some of the more interesting sessions that grabbed my attention at this meeting.


Tech Note: Measuring DNS Behaviour

The DNS is a very simple protocol. The protocol is a simple query / response interaction where the client passes a DNS transaction to a server with the query part of the transaction completed. The server fills in the answer part and possibly adds further information in the additional information…


Diving into the DNS

If you are at all interested in how the Internet’s Domain Name System (DNS) works, then one of the most rewarding meetings that is dedicated to this topic is the DNS OARC workshops. I attended the spring workshop in Amsterdam in early May, and the following are my impressions from…


The Internet of Stupid Things

In those circles where Internet prognostications abound and policy makers flock to hear grand visions of the future, we often hear about the boundless future represented by “The Internet of Things”. This phrase encompasses some decades of the computing industry’s transition from computers as esoteric piece of engineering affordable only…


The Mobile Internet

It has been observed that the most profound technologies are those that disappear


NANOG 63: The DDOS Conversation

In some ways the details of specific case of DDOS attacks are less material than the larger picture. The Internet always had the potential issue that the aggregate sum of I/O capacity of the edge was massively larger than the interior, and the sum of multiple edge outputs was always…