DNS Security

DNS, Domain Names, and Certificates: The Missing Links in Most Cybersecurity Risk Postures

In 2019, we've seen a surge in domain name system (DNS) hijacking attempts and have relayed warnings from the U.S. Cybersecurity and Infrastructure Agency, U.K.'s Cybersecurity Centre, ICANN, and other notable security experts. Although the topic has gained popularity amongst CIOs and CISOs, most companies are still overlooking important security blind spots when it comes to securing their digital assets outside the enterprise firewalls -- domains, DNS, digital certificates.

What’s Behind the Secure DNS Controversy and What Should You Do About It?

Anyone that has attended a meeting of the Internet Engineering Task Force (IETF) will know that the somewhat dry topic of internet protocols is often the source of passionate disagreement. But rarely does that debate extend beyond the confines of internet engineers. That has not been the case with a new protocol which aims to make the Internet's underlying domain name system more secure by default.

Recognizing Lessons Learned From the First DNSSEC Key Rollover, a Year Later

A year ago, under the leadership of the Internet Corporation for Assigned Names and Numbers (ICANN), the internet naming community completed the first-ever rollover of the cryptographic key that plays a critical role in securing internet traffic worldwide. The ultimate success of that endeavor was due in large part to outreach efforts by ICANN and Verisign which, when coupled with the tireless efforts of the global internet measurement community, ensured that this significant event did not disrupt internet name resolution functions for billions of end users.

DNS Wars

The North American Network Operators' Group (NANOG) is now quite an institution for the Internet, particularly in the North American Internet community. It was an offshoot of the Regional Techs meetings, which were part of the National Science Foundation Network (NSFNET) framework of the late 80s and early 90s. NANOG has thrived since then and is certainly one of the major network operational forums in today's Internet – if not the preeminent forum for network operators for the entire Internet.

Doing Our Part for a Safer, Stronger DNS

Public Interest Registry is the industry leader of DNS Anti-Abuse efforts on the Internet. Since our inception, we have worked to empower people and organizations that use the Internet to make the world a better place. Whether a .ORG is the foundation of an individual voice, a global non-profit, or any organization that is part of the mission-driven .ORG community, we are proud to have earned the trust of so many dedicated users.

Call for Participation – ICANN DNSSEC and Security Workshop at ICANN66, Montreal, Canada

The ICANN Security and Stability Advisory Committee (SSAC) and the Internet Society Deploy360 Programme are planning a DNSSEC and Security Workshop on Wednesday, 06 November 2019, during the ICANN66 meeting held from 02-07 November 2019 in Montreal, Canada. The original DNSSEC Workshop has been a part of ICANN meetings for many years and has provided a forum for both experienced and new people to meet, present and discuss current and future DNSSEC deployments.

DoH Creates More Problems Than It Solves

Unlike most new IETF standards, DNS over HTTPS has been a magnet for controversy since the DoH working group was chartered on 2017. The proposed standard was intended to improve the performance of address resolutions while also improving their privacy and integrity, but it's unclear that it accomplishes these goals. On the performance front, testing indicates DoH is faster than one of the alternatives, DNS over TLS (DoT).

DNS-over-HTTPS: Privacy and Security Concerns

The design of DNS included an important architectural decision: the transport protocol used is user datagram protocol (UDP). Unlike transmission control protocol (TCP), UDP is connectionless, stateless, and lightweight. In contrast, TCP needs to establish connections between end systems and guarantees packet ordering and delivery. DNS handles the packet delivery reliability aspect internally and avoids all of the overhead of TCP. There are two problems this introduces.

DoT and DoH Guidance: Provisioning Resolvers

As part of a larger effort to make the internet more private, the IETF defined two protocols to encrypt DNS queries between clients (stub resolvers) and resolvers: DNS over TLS in RFC 7858 (DoT) and DNS over HTTPS in RFC 8484 (DoH). As with all new internet protocols, DoT and DoH will continue to evolve as deployment experience is gained, and they're applied to more use cases.

The Promise of Multi-Signer DNSSEC

DNSSEC is increasingly adopted by organizations to protect DNS data and prevent DNS attacks like DNS spoofing and DNS cache poisoning. At the same time, more DNS deployments are using proprietary DNS features like geo-routing or load balancing, which require special configuration to support using DNSSEC. When these requirements intersect with multiple DNS providers, the system breaks down.