DNS

Introduction: New gTLD Security and Stability Considerations (Part 1 of 5 )

Verisign recently published a technical report on new generic top-level domain (gTLD) security and stability considerations. The initial objective of the report was to assess for Verisign's senior management our own operational preparedness for new gTLDs, as both a Registry Service Provider for approximately 200 strings, as well as a direct applicant for 14 new gTLDs... However, in cataloging internal and external risks related to the new gTLD program, we found several far-reaching and long-standing issues that need to be further explored and/or resolved with varying levels of urgency. more

How to Prepare for the Day When Your Domain(s) Are Misbehaving

For a number of years, there have been many different high profile incidents where major websites were defaced, taken offline, or crippled due to issues related to their domain registration. Last night, there was an incident where several high profile domains went offline due to issues at their registrar, and they are now coming back online after what I am sure was a few crazy hours for their operations teams and management. more

LinkedIn Outage Due to DNS Issue

Users of LinkedIn were unable to access the site for several hours due to what the company has reported to have been a DNS issue. The site is claimed to have been accidentally pointed to a domain name parking page and some users were greeted with a domain for sale page when trying to access LinkedIn's homepage. According to downrightnow, LinkedIn's outage began around 6 pm PST on Wednesday and is continuing, though website has gradually resumed for some users. more

UNESCO Director-General on Linguistic Diversity on the Internet: Main Challenges Are Technical

Today, Irina Bokova, Director-General of UNESCO has released a statement concerning the linguistic diversity on the Internet stating: "UNESCO's experience and the 2012 study of the use of internationalized domain names undertaken with EURid show that the main challenges are technical. Obstacles lie with Internet browsers that do not consistently support non-ASCII characters, with limited e-mail functionality, and with the lack of support of non-ASCII characters in popular applications, websites and mobile devices." more

BIND 9 Users Should Upgrade to Most Recent Version to Avoid Remote Exploit

A remote exploit in the BIND 9 DNS software could allow hackers to trigger excessive memory use, significantly impacting the performance of DNS and other services running on the same server. A flaw was recently discovered in the regular expression implementation used by the libdns library, which is part of the BIND package. The flaw enables a remote user to cause the 'named' process to consume excessive amounts of memory, eventually crashing the process and tying up server resources to the point at which the server becomes unresponsive. more

The Rise of Cyrillic Domain Names

This week, on a cruise ship navigating Russia's Neva river, around 250 domain registrars and resellers are gathered for the RU-CENTER annual domain conference. RU-CENTER is the largest Russian registrar in a market that is dominated by three companies. RU-CENTER and competitor Reg.Ru both manage around 28% of domains registered in the country's national suffix... RU-CENTER is also a figurehead for Russia's drive to make Internet use more palatable for those who are not natural ASCII writers. more

Multi-Layer Security Architecture - Importance of DNS Firewalls

In today's world with botnets, viruses and other nefarious applications that use DNS to further their harmful activities, outbound DNS security has been largely overlooked. As a part of multi-layer security architecture, a DNS Firewall should not be ignored. After serving as a consultant for multiple organizations, I have encountered many companies that allow all internal devices to send outbound DNS queries to external DNS servers - a practice that can lead to myriad problems. more

DNS Bug Disclosure: ICANN Releases New Guidelines

The Internet Corporation for Assigned Names and Numbers (ICANN) has released new guidance concerning the reporting and disclosure of bugs that affect the Domain Name System, including information of how ICANN itself will behave in response to vulnerabilities. Until recently, ICANN, which is responsible for maintaining the root domain servers at the heart of the DNS system, had no specific guidelines for the reporting of vulnerabilities, leaving responsible disclosure protocols up to the researchers who discovered the bug. more

ICANN 46 Starts This Week In Beijing - Remote Participation Is Possible

The 46th meeting of the Internet Corporation for Assigned Names and Numbers (ICANN) takes place this week in Beijing, China, and will bring together leaders from all over the world to discuss and debate a wide range of issues related to domain names and the surrounding industry. One can expect that the new gTLDs, a topic frequently discussed here on CircleID, will naturally consume a great amount of the discussion at ICANN 46. more

Don’t Blame Open Recursives For DDoS Attacks and Why You Should Implement BCP38

There has been plenty of buzz and chatter on the Internet recently concerning a very large DDoS attack against CloudFlare, with coverage on their blog, the New York Times, and the BBC, among many others. While attacks of this nature are certainly nothing new, the scale of this attack was surprising, reported to hit 120Gbps. For a sense of scale, your average cable modem is only about 20Mbps, or about 0.016% of that bandwidth. more

U.S. CERT Issues Alert on DNS Amplification Attacks

Neil Schwartzman writes to report that U.S. Cert issued Alert TA13-088A on Friday March 29, 2013. "It is a solid how-to guide to test for, and remediate DNS configurations that can be used for Distributed Denial of Service attacks." more

Live Webcast Thursday March 28 of ION Singapore IPv6 and DNSSEC Sessions

For those of you interested in IPv6 and/or DNSSEC, we'll have a live webcast out of the Internet Society's ION Singapore conference happening tomorrow, March 28, 2013, starting at 2:00pm Singapore time. more

Google Announces DNSSEC Support for Public DNS Service

Google today announced that its "Public DNS" service is now performing DNSSEC validation. Yunhong Gu, Team Lead for Google Public DNS, in post today wrote: "We launched Google Public DNS three years ago to help make the Internet faster and more secure.Today, we are taking a major step towards this security goal: we now fully support DNSSEC (Domain Name System Security Extensions) validation on our Google Public DNS resolvers." more

ICANN Releases Guideline for Coordinated Vulnerability Disclosure Reporting

ICANN has released a set of guidelines to explain its Coordinated Vulnerability Disclosure Reporting. The guidelines serve two purposes, says ICANN: "They define the role ICANN will perform in circumstances where vulnerabilities are reported and ICANN determines that the security, stability or resiliency of the DNS is exploited or threatened. The guidelines also explain how a party, described as a reporter, should disclose information on a vulnerability discovered in a system or network operated by ICANN." more

An Introduction to Security and Reliability - What Does It Really Mean?

I co-authored a book in 2005, titled "Extreme Exploits: Advanced Defenses Against Hardcore Hacks." My chapters focused on securing routing protocols such as BGP, and securing systems related to DMZs, firewalls, and network connectivity. As I look back over those chapters, I realize that the basic fundamentals of network security really haven't changed much even though technology has advanced at an incredible pace. "Defense in depth" was a hot catch phrase seven years ago, and it still applies today. more