Networks

Networks / Most Viewed

IPv6 Security Myth #10: Deploying IPv6 is Too Risky

After a quick break to catch our breath (and read all those IPv6 Security Resources), it's now time to look at our tenth and final IPv6 Security Myth. In many ways this myth is the most important myth to bust. Let's take a look at why... Myth: Deploying IPv6 Makes My Network Less Secure... I can hear you asking "But what about all those security challenges we identified in the other myths?" more

How the Internet Can Be Enormously Accelerated Without Fiber-Optic Cables or LEO Satellites

We got used to it: if we open a website, it's always like stop and go on a high-traffic highway or city traffic jam. At some point, we will reach the destination. The constant stalling is due to a traffic rule for the Internet called TCP (Transmission Control Protocol). The TCP/IP protocol family comes from the American defense industry. It was introduced by DARPA (Defence Advanced Research Projects Agency) in the early 1970s. At that time, no one had the Internet as the need of the masses on the screen. more

The Future of Home Networking: A Problem Statement

I'm a network engineer, and like many engineers I often gravitate to the big projects; large networks with problems of scale and complexity in my case. However, I also consider myself a student of Occam's razor and often quote Antoine de Saint-ExupĂ©ry: "perfection is reached not when there is nothing left to add, but when there is nothing left to take away." In this spirit of "less is more" I have recently become intrigued by the problems appearing in home networking. more

Study Reports on Baseline of Global IPv6 Adoption

A new research on native IPv6 traffic across six large providers in North America and Europe suggest that despite fifteen years of IPv6 standards development, vendor releases and advocacy, only a small fraction of the Internet has adopted IPv6. "The slow rate of IPv6 adoption stems from equal parts of technical/design hurdles, lack of economic incentives and general dearth of IPv6 content." more

Examining Actual State of IPv6 Deployment

There have been quite a number of recent articles about various IPv6 issues. Thus the question: how far along is the actual IPv6 deployment? This is a quick-and-dirty survey that focuses mainly on the content provider side. What domains were surveyed? Alexa offers country depended TopSites listings. Domains listed are frequently visited by users from that country, not necessarily hosted there... more

Two Stage Filtering for IPv6 Electronic Mail

I'm a guest at the MAAWG conference in San Francisco this week and several people have now mentioned to me the problem and the opportunity of anti-spam e-mail filtering for IPv6. Tomorrow is World IPv6 Day but since a bunch of the pieces have clicked together in my head I'll post this a day early. more

Valuing IP Addresses

The prospect of exhaustion of the IPv4 address space is not a surprise. We've been anticipating this situation since at least 1990. But it's a "lumpy" form of exhaustion. It's not the case that the scarcity pressures for IP addresses are evidently to the same level in every part of the Internet. It's not the case that every single address is being used by an active device. A couple of decades ago we thought that an address utilisation ratio of 10% (where, for example, a block of 256 addresses would be used in a network with some 25 addressed devices) was a great achievement.  more

Verisign’s Perspective on Recent Root Server Attacks

On Nov. 30 and Dec. 1, 2015, some of the Internet's Domain Name System (DNS) root name servers received large amounts of anomalous traffic. Last week the root server operators published a report on the incident. In the interest of further transparency, I'd like to take this opportunity to share Verisign's perspective, including how we identify, handle and react, as necessary, to events such as this. more

The Internet Infrastructure: Stability vs. Innovation

Stratton Sclavos of VeriSign distills the essence of the SiteFinder controversy in his CNet interview...There is a subtle but essential misunderstanding here. Innovation can and should happen in Internet infrastructure, but there are a handful of core elements that must remain open and radically simple if the Internet is to remain, well, the Internet. These include TCP/IP, SMTP, HTTP, BIND, BGP, and the DNS (especially the .com registry). Any change in these protocols should be very carefully vetted through a consensus-based process. more

IPv6 Hour… One, Two, Three, IPv4 Switched Off!

It happened in San Jose, it happened in Taiwan and soon it will happen in Philadelphia! A nightmare? A conspiracy? No, no, it was just the IPv6 hour. One hour of pure IPv6 LAN for NANOG attendees with a NAT-PT as valve to the crowded teeming world of the IPv4 internet... At 12 noon, Tuesday February 19th it happened! While Mac, Vista, Linux and Unix can breathe AAAA, Windows XP however cannot do DNS over IPv6 transport. What to do to avoid all these Windows XP users... more

Transport vs. Network

One of the basic tools in network design is the so-called "stacked" protocol model. This model was developed in the late 1970s as part of a broader effort to develop general standards and methods of networking. In 1983, the efforts of the CCITT and ISO were merged to form The Basic Reference Model for Open Systems Interconnection, usually referred to as the Open Systems Interconnection Reference Model or the "OSI model." more

The Internet Lost in Translation

In 1949 a Bell Laboratory researcher, Claude Shannon, published a paper on a new science of "Information". Bell Labs had sponsored the research with the goal of improving phone networks but was not prepared to embrace the full implications of the new science which made explicit the distinction between information in the information sense and information encoded in numbers or bits... more

Webinar Tomorrow (May 22) - IPv6 and Telecom: IPv4 is Finally Running Out. Now What?

What is the impact of IPv6 on telecommunications, VoIP, unified communications, etc? Why should telecom operators care about IPv6? What VoIP systems already support IPv6? What efforts are underway within organizations like the IETF and the SIP Forum to ensure that telecommunications can work over IPv6? more

Wired vs Wireless Debate Becomes a Core Policy Differentiator in National Election

I never thought I'd see the day when the difference in capability between a wireless and a wireline Internet would become a core policy differentiator in a national election, but this has now happened in Australia. ... It seems that everyone has an interest in a ubiquitous, fast and cheap internet. Now that interest has been taken up as a major policy differentiator by both sides of the political spectrum in the recent Australian election. What was this all about? more

The Internet’s Gilded Age

The rise of the Internet has heralded rapid changes in our society. The opportunities presented by a capable and ubiquitous communications system and a global transportation network have taken some corporations from the multinational to the status of truly global mega-corporation. Good examples of these new corporations include Google, Apple, Amazon, Microsoft and Facebook. There are a handful of large-scale winners in this space and many losers. But this is not the first time we've witnessed a period of rapid technological and social change. more