DDoS / Featured Blogs

Verisign OpenHybrid: An Essential New Approach to DDoS Protection

Distributed Denial of Service (DDoS) attacks are a threat to businesses worldwide and the attacks are getting larger and more sophisticated. The industry's approach to protecting against DDoS attacks must change, and change fundamentally, to stay ahead of this growing threat. For too long, the problem has been tackled piecemeal, using isolated devices or services. But protecting against DDoS attacks increasingly requires communication and coordination between many components... more»

A Cancerous Computer Fraud and Misuse Act

As I read through multiple postings covering the proposed Computer Fraud and Misuse Act, such as the ever-insightful writing of Rob Graham in his Obama's War on Hackers or the EFF's analysis, and the deluge of Facebook discussion threads where dozens of my security-minded friends shriek at the damage passing such an act would bring to our industry, I can't but help myself think that surely it's an early April Fools joke. more»

CircleID's Top 10 Posts of 2014

Here we are with CircleID's annual roundup of top ten most popular posts featured during 2014 (based on overall readership). Congratulations to all the participants whose posts reached top readership and best wishes for 2015. more»

Verisign Mitigates 300 Gbps DDoS Attack and Other Q2 2014 DDoS Trends

It has been another busy quarter for the team that works on our DDoS Protection Services here at Verisign. As detailed in the recent release of our Q2 2014 DDoS Trends Report, from April to June of this year, we not only saw a jump in frequency and size of attacks against our customers, we witnessed the largest DDoS attack we've ever observed and mitigated -- an attack over 300 Gbps against one of our Media and Entertainment customers. more»

Six Approaches to Creating an Enterprise Cyber Intelligence Program

As few as seven years ago, cyber-threat intelligence was the purview of a small handful of practitioners, limited mostly to only the best-resourced organizations - primarily financial institutions that faced large financial losses due to cyber crime - and defense and intelligence agencies involved in computer network operations. Fast forward to today, and just about every business, large and small, is dependent on the Internet in some way for day-to-day operations, making cyber intelligence a critical component of a successful business plan. more»

Anti-Spoofing, BCP 38, and the Tragedy of the Commons

In the seminal 1968 paper "The Tragedy of the Commons" , Garrett Hardin introduced the world to an idea which eventually grew into a household phrase. In this blog article I will explore whether Hardin's tragedy applies to anti-spoofing and Distributed Denial of Service (DDoS) attacks in the Internet, or not... Hardin was a biologist and ecologist by trade, so he explains "The Tragedy of the Commons" using a field, cattle and herdsmen. more»

Painting Ourselves Into a Corner with Path MTU Discovery

In Tony Li's article on path MTU discovery we see this text: "The next attempt to solve the MTU problem has been Packetization Layer Path MTU Discovery (PLPMTUD). Rather than depending on ICMP messaging, in this approach, the transport layer depends on packet loss to determine that the packet was too big for the network. Heuristics are used to differentiate between MTU problems and congestion. Obviously, this technique is only practical for protocols where the source can determine that there has been packet loss. Unidirectional, unacknowledged transfers, typically using UDP, would not be able to use this mechanism. To date, PLPMTUD hasn't demonstrated a significant improvement in the situation." Tony's article is (as usual) quite readable and useful, but my specific concern here is DNS... more»

Do I need DDoS protection? A Realistic Look at the Decision Process

There has been a recent spate of well publicised Distributed Denial of Service (DDoS) attacks that bring websites down and render them useless, including Evernote and most recently Feedly. In light of this, here are some comments and tips to help companies evaluate and prepare not to be held for ransom or suffer lost reputation and sales as a result. more»

NANOG 61 - Impressions of Some Presentations

The recent NANOG 61 meeting was a pretty typical NANOG meeting, with a plenary stream, some interest group sessions, and an ARIN Public Policy session. The meeting attracted some 898 registered attendees, which was the biggest NANOG to date. No doubt the 70 registrations from Microsoft helped in this number, as the location for NANOG 61 was in Bellevue, Washington State, but even so the interest in NANOG continues to grow... more»

Recommendations for Adding Cybersecurity Intelligence to the Smart Grid

Over the last few years, there has been an increased effort to modernize the U.S. electric grid. Building a "Smart Grid" has been central in the effort to help utilities better manage their resources, minimize power outages and reduce energy consumption. However, adding more electronic devices and sensors to the grid's network has made it a prime target of cyberattacks, like Distributed Denial of Service (DDoS) attacks, which if successful, could cause wide-spread disruption of services affecting many other sectors. more»