DNS

Recent Industry Changes: Internet Standards, ARIN WHOIS Changes, Hotmail Postmaster Pages

Signing Email is now a Draft Standard! Signing email transitioned from a proposed standard to a draft standard (RFC6376 -- one of the new RFCs) over at the IETF a few days ago. The other is RFC6377. Let's go through a brief history of DKIM RFCs to refresh our memories... more

ICANN Launches Online Information Center for New gTLDs

ICANN has launched a micro-site to serve as the online source for New Generic Top-Level Domain (New gTLDs) Program. From ICANN's announcement: "ICANN is in the midst of a major campaign to raise awareness around the world about the impact and possibilities of new gTLDs. The new site represents a foundational expression of the campaign. Many more new articles, tools, and materials will be made available in the coming days and weeks." more

Report on Today’s State of DNS Services

The Domain Name System, or DNS, has come a long way since its early days and the constant expansion of consumer activity and security concerns has raised further awareness about the critical role of the DNS. However, as the Yankee Group Research points out in a recent report, "there are more changes coming that are also raising the profile of DNS -- notably the move to cloud computing and the migration to IPv6." Suffice to say this is "Not Your Father's DNS". The report titled, "DNS: Risk, Reward and Managed Services" takes a fresh look at today's state of the DNS and the pros and cons of in-house, ISP and managed service provider DNS management options. more

TLD Domain Abuse: Threat Report - First Half 2011

When it comes to building a robust globe-spanning network of crimeware and making the victims dance to a tune of the cyber-criminals' choosing, you're guaranteed to find domain name abuse at the heart of the operation. DNS provides the critical flexibility and underlying scalability of modern command-and-control (C&C) infrastructure. Cyber-criminals that master DNS (and manage to maintain the stream of new domain registrations that keep it fed) tend to find themselves in command of the largest and most profitable crimeware networks. more

The Design of the Domain Name System, Part VII - Related Names Are Not Related

In previous installments we've been looking at aspects of the design of the DNS. Today we look at the relationship of similar names in the DNS. A poorly appreciated aspect of the DNS is that there is no inherent relationship between similar looking names. more

The Design of the Domain Name System, Part VI - Overloaded Record Types

In the five previous exciting installments, we've been looking at aspects of the design of the DNS. Today we look at records types, and how you can tell what a DNS record means. All the records in the DNS are strongly typed. Each record includes an RRTYPE, a small number, which defines both the format of the record and what the record means. It is possible and common to have different record types with the same format, but different meanings. more

The Design of the Domain Name System, Part V - Large Data

In the previous four installments, we've been looking at aspects of the design of the DNS. Today we look at the amount of data one can ask the DNS to store and to serve to clients. Most DNS queries are made via UDP, a single packet for query and a single packet for the response, with the packet size traditionally limited to 512 bytes. This limits the payload of the returned records in a response packet to about 400 bytes... more

Domain Name Registrations Reach 215 Million, 5 Million Added in Q2

The latest Domain Name Industry Brief published by Verisign reports more than 5 million domain names were added to the Internet in the second quarter of 2011, bringing the total number of registered domain names to more than 215 million worldwide across all domains. The increase of 5.2 million domain names marks a growth rate of 2.5 percent over the first quarter. Registrations have grown by more than 16.9 million, or 8.6 percent, since the second quarter of 2010. more

European Commission Seeking Greater Governmental Control Over the Internet

Kieren McCarthy reporting in .nxt: "An extraordinary series of policy papers drawn up by the European Commission and seen by .Nxt have called for greater governmental control over the Internet's domain name system. ...the measures would provide governments with de facto control over the Internet's naming systems and bring an end to the independent and autonomous approach that has defined the Internet's domain name system since its inception." more

The Design of the Domain Name System, Part IV - Global Consistency

In the previous installments, we've been looking at aspects of the design of the DNS. Many databases go to great effort to present a globally consistent view of the data they control, since the alternative is to lose credit card charges and double-book airline seats. The DNS has never tried to do that. The data is roughly consistent, but not perfectly so. more

The Design of the Domain Name System, Part III - Name Structure and Delegation

In the previous installments, we looked at the overall design of the DNS and the way DNS name matching works. The DNS gains considerable administrative flexibility from its delegation structure. Each zone cut, the place in the DNS name tree where one set of DNS servers hands off to another, offers the option to delegate the administration of a part of the DNS at the delegation point. more

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. more

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. more

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. more

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. more