Geoff Huston's recent post about the rise of DNS amplification attacks offers excellent perspective on the issue. Major incidents like the Spamhaus attack Geoff mentions at the beginning of his post make headlines, but even small attacks create noticeable floods of traffic. These attacks are easy to launch and effective even with relatively modest resources and we see evidence they're occurring regularly. Although DNS servers are not usually the target of these attacks the increase in traffic and larger response sizes typically stress DNS infrastructure and require attention from operation teams. more
Most people - mistakenly - believe that they are perfectly safe behind a firewall, network address translation (NAT) device or proxy. The fact is quite the opposite: if you can get out of your network, someone else can get in. Attackers often seek to compromise the weakest link in a network and then use that access to attack the network from the inside, commonly known as a "pivot-and-attack." more
My blog 'What PRISM, credit card hacking and Chromecast have to do with FttH' led to some very interesting discussions all around the world. One of issues that was discussed was that the sheer capacity of FttH will also allow hackers, criminals and others to use that massive capacity for the wrong reasons. Its volume will make it increasingly difficult to police. more
The world of Internet threats has changed continually over the years. From the time that a "worm" first showed up in the wild, or whenever someone penetrated a system without authorization for the first time, various forms of attacks and malware have presented dangers to the system and those who use it. Different vectors have received varied focus over the years... Many parts of the Internet community have been involved in addressing relevant issues and fostering efforts to combat them. more
In part one of this post we introduced the cyber response curve. In this post, we have outlined some observations which illustrate how different level of maturity and approaches can affect your cyber response curve. more
Many cyber attacks against companies today go unreported, and more still are undetected... Timing and context are everything. The faster a company identifies a problem, and the faster and deeper it is understood and its relevance to the business, the more effectively the company can respond. We call this squeezing the cyber response curve. This two-part post will discuss the current state of cyber threats, what the cyber response curve is and its impact your organization and how you can effectively squeeze this curve to improve attack response. more
Since last fall, several waves of distributed denial of service (DDoS) attacks have targeted major players in the U.S. banking industry. JPMorgan Chase, Wells Fargo and PNC were among the first to sustain intermittent damage. Eventually, the top 50 institutions found themselves in the crosshairs... In the months to come, security experts would praise the banks' collective response, from heightened DDoS protection to candid customer communications.. these larger institutions have learned some painful lessons that smaller firms might heed as they seek to minimize risks. more
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
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
According to a press release by the Openbaar Ministerie (the Public Prosecution Office), a dutch man with the initials SK has been arrested in Spain for the DDoS attacks on Spamhaus. more
We recently analyzed the reputation of a country's Internet (IPv4) addresses by examining the number of blacklisted IPv4 addresses that geolocate to a given country. We compared this indicator with two qualitative measures of each country's governance. We hypothesized that countries with more transparent, democratic governmental institutions would harbor a smaller fraction of misbehaving (blacklisted) hosts. The available data confirms this hypothesis. A similar correlation exists between perceived corruption and fraction of blacklisted IP addresses. more
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
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
The newly released handbook applies the practice of international law with respect to electronic warfare. The Tallinn Manual on the International Law Applicable to Cyber Warfare -- named for the Estonian capital where it was compiled -- was created at the behest of the NATO Co-operative Cyber Defence Centre of Excellence, a NATO think tank. It takes current rules on battlefield behaviour, such as the 1868 St Petersburg Declaration and the 1949 Geneva Convention, to the internet, occasionally in unexpected ways. more
According to reports, North Korea has accused the United States for conducting a cyberattack that has disrupted Internet connectivity in the country. "While the details of the cause of the disruption are unknown, we can confirm that in the last two days, North Korea's sole Internet provider has, in fact, suffered from disruptions in connectivity to the global Internet," reports Doug Madory from Renesys. more
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