DNS

Underneath the Hood: Ownership vs. Stewardship of the Internet

As is well known to most CircleID readers - but importantly, not to most other Internet users - in March 2011, ICANN knowingly and purposefully embraced an unprecedented policy that will encourage filtering, blocking, and/or redirecting entire virtual neighborhoods, i.e., "top-level domains" (TLDs). Specifically, ICANN approved the creation of the ".XXX" suffix, intended for pornography websites. Although the owner of the new .XXX TLD deems a designated virtual enclave for morally controversial material to be socially beneficial for the Internet, this claim obfuscates the dangers such a policy creates under the hood.

The Design of the Domain Name System, Part II - Exact and Approximate Name Matching

In the previous installment, we looked at the overall design of the DNS. Today we'll look at the ways it does and does not allow clients to look up data by name. The most important limitation of the DNS, compared to other databases, is that it only does exact match lookups. That is, with a few minor exceptions, the name in the query has to match the name of the desired records exactly.

The Design of the Domain Name System, Part I

Over the past 30 years the Domain Name System has become an integral part of the operation of the Internet. Due to its ubiquity and good performance, many new applications over the years have used the DNS to publish information. But as the DNS and its applications have grown farther from its original use in publishing information about Internet hosts, questions have arisen about what applications are appropriate for publication in the DNS, and how one should design an application to work well with the DNS.

Prediction Methods for Crime

There's a new sheriff in town and he's riding the horse of "predictive policing". Back in July the Santa Cruz Police Department began deploying police officers to places where crime is likely to occur in the future -- making use of new predictive modeling programs that are designed to provide daily forecasts of crime hotspots -- thereby allowing the Department to preempt more serious crimes before they occurred. In essence, this is another physical-world application of machine learning and clustering technologies -- applied to preempting a criminal problem. In the cyber-world we've been applying these techniques for a number of years with great success.

Defense in Depth for DNSSEC Applications

At the time of this writing DNSSEC mostly does not work. This is not a bad thing - in fact it's expected... There is a significant last-mover advantage DNSSEC deployment (or IPv6 deployment) and that can't be helped. It's all in a good cause though - everybody knows we need this stuff and some farsighted contributors put a lot of money and other resources into DNSSEC years or decades ago to ensure that when the time comes the world will have a migration path. Sadly, this leaves current investors and application designers and developers wondering whether there's a market yet.

Kudos to ccTLD Registries for Taking Measures to Improve Security

When I first wrote about Domain Registry Locking over a year and a half ago, Verisign was the only Registry offering a true Registry Lock Service. Of course, not long after, Neustar announced their Registry Lock Service too. Recently however, a number of ccTLD Registries have also adopted Registry Locking programs...

ICANN Finds Its Voice

I think we are finally getting somewhere: ICANN is no longer fluttering flusteredly whenever a lobbying group sends a nastygram over the transom. Case in point: a Association of National Advertisers (ANA) that arrived a few days ago, full of bombast and muscle-flexing, demanding that ICANN immediately stop the new gTLD program until a long list of demands from the ANA were met, or else the ANA would be forced to take some Very Scary Actions...

DDoS Attacks: Don’t Be In Denial of the Risks

Unlike traditional attacks by hackers which breach a business's security systems, resulting in defaced websites, intellectual property theft and/or customer data theft, a DDoS attack focuses on making a business's Internet connected infrastructure (e.g. web servers, email servers, database servers, FTP servers, APIs, etc.) unavailable to legitimate users. A business's brand reputation, which can take years to establish, can be swept away in just a few hours from a single DDoS attack in the same way a natural disaster like a flood or earthquake can impact a traditional brick and mortar business.

The Rising Technical Challenges of Networking at Home

For me, one of the more interesting sessions at the recent IETF 81 meeting in July was the first meeting of the recently established Homenet Working Group. What's so interesting about networking the home? Well, if you regard challenges as "interesting", then just about everything is interesting when you look at networking in the home!

.Nxt - You Are All Cordially Invited

There are only a few occasions in any of our lifetimes where what we know and have grown used to is turned on its head. We have now lost the generation that heard radio for the first time; there are only a few who can recall the first television pictures; but many, many more saw color appear on their screens for the first time.