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Larry Seltzer wrote an interesting article for eWeek, on port 25 blocking, the reasons why it was being advocated, and how it would stop spam. This quoted an excellent paper by Joe St.Sauver, that raised several technically valid and true corollaries that have to be kept in mind when blocking port 25 -- "cough syrup for lung cancer" would be a key phrase... Now, George Ou has just posted an article on ZDNET that disagrees with Larry's article, makes several points that are commonly cited when criticizing port 25 blocking, but then puts forward the astonishing, and completely wrong, suggestion, that worldwide SPF records are going to be a cure all for this problem. Here is my reply to him... more
For some years now the general uptake of IPv6 has appeared to be "just around the corner". Yet the Internet industry has so far failed to pick up and run with this message, and it continues to be strongly reluctant to make any substantial widespread commitment to deploy IPv6. Some carriers are now making some initial moves in terms of migrating their internet infrastructure over to a dual protocol network, but for many others it's a case of still watching and waiting for what they think is the optimum time to make a move. So when should we be deploying IPv6 services? At what point will the business case for IPv6 have a positive bottom line? It's a tough question to answer, and while advice of "sometime, probably sooner than later" is certainly not wrong, it's also entirely unhelpful as well! more
For the first time in Internet history the number of instances of DNS root servers outside the United States has overtaken the number within. The balance was tipped by the recent launch in Frankfurt of an anycast instance of the RIPE NCC operated K-root server. The K-root server is one of the 13 DNS root servers that resolve lookups for domain names all over the world and form a critical part of the global Internet infrastructure. The K-root server has been operated by the RIPE NCC since 1997 when the first server was installed at the London Internet Exchange (LINX) in London, UK. more
Imagine my surprise upon reading a BBC article which identified ISC BIND as the top security vulnerability to UNIX systems. At ISC, we have striven for a decade to repair BIND's reputation, and by all accounts we have made great progress. "What could this be about," I wondered, as I scanned the BBC article for more details. It turns out that BBC was merely parroting what it had been told by SANS. OK, let's see what SANS has to say... more
Network Solutions is having problems with "all" its name servers, according to their tech support and a recent post on North American Network Operators' Group (NANOG) mailing list indicates that it has been under very large-scale UDP/53 DDoS attack for the last 48 hour period. As a result, domain names hosted with Network Solutions' Worldnic have been affected. Network Solutions is one of the leading domain registrars and DNS hosting providers in the world, managing more than 7.6 million domain names. more
One of the most prominent denial of service attacks in recent months was one that occurred in March 2013 between Cloudflare and Spamhaus... How did the attackers generate such massive volumes of attack traffic? The answer lies in the Domain Name System (DNS). The attackers asked about domain names, and the DNS system answered. Something we all do all of the time of the Internet. So how can a conventional activity of translating a domain name into an IP address be turned into a massive attack? more
It is once again time for our annual review of posts that received the most attention on CircleID during the past year. Congratulations to all the 2017 participants for sharing their thoughts and making a difference in the industry. 2017 marked CircleID's 15th year of operation as a medium dedicated to all critical matters related to the Internet infrastructure and services. We are in the midst of historic times, facing rapid technological developments and there is a lot to look forward to in 2018. more
In the last days, news and government web sites in Georgia suffered DDoS attacks. While these attacks seem to affect the Georgian Internet, it is still there... Up to the Estonian war, such attacks would be called "hacker enthusiast attacks" or "cyber terrorism" (of the weak sort). Nowadays any attack with a political nature seems to get the "information warfare" tag. When 300 Lithuanian web sites were defaced last month, "cyber war" was the buzzword. Running security for the Israeli government Internet operation and later the Israeli government CERT such attacks were routine... more
In March, I posted a call to action to those of us in the community who have the inclination to fight against a movement to redact information critical to anti-abuse research. Today, I felt compelled to react to some of the discussions on the ICANN discussion list dedicated to the issue of WHOIS reform: Sorry, not sorry: I work every working hour of the day to protect literally hundreds of millions of users from privacy violating spam, phish, malware, and support scams. more
CircleID recently interview Paul Vixie, Founder & Chairman of Internet Software Consortium (ISC), to discuss ISC's newly formed Operations, Analysis, and Research Center (OARC). OARC is launched in response to DDoS attacks at the Internet's core infrastructure and the vital requirement for a formal coordination system. OARC is also a part of US homeland security initiatives, such as the formation of Information Sharing and Analysis Centers (ISACs).
"Registries and registrars, ccTLD operators, large corporate NOCs, ISPs and ecommerce companies that host many domain names are all likely candidates. This is also a natural for law enforcement groups that are worried about attacks on the Internet." more
The domain name system (DNS) grew to prominence during the initial, innocent days of the internet. During that time, early internet users tended to work for government or education organizations where trust was assumed, and security was not even a consideration. Since the online community was small and the internet was sparsely used, the importance of DNS was not widely understood, and as a consequence, left undefended. more
In light of the Biden administration's recent efforts in protecting critical infrastructure from cyber threats, new research from CSC indicates that a majority of the top energy companies in the U.S. are vulnerable to attack due to shortcomings in their online operations. Specifically, these organizations are vulnerable to domain name and domain name system (DNS) hijacking and phishing attacks based on their lack of effective domain security. more
The term "attack surface" is often heard in cybersecurity conversations. It refers to the sum of all possible attack vectors or the vulnerabilities that threat actors can exploit to penetrate a target network or damage an organization somehow. An unused and forgotten subdomain, for instance, can become an attack vector when taken over. Certain categories of companies have very large attack surfaces. Such is the case of streaming media businesses like Netflix and HBO Max. more
Building IoT ventures from scratch by prototyping hardware devices and their backend systems as well as working for a large company that tries to sell IoT devices itself, we learned a lot about the pitfalls and problems concerning security in the IoT. Nearly every connected device out there proved to be vulnerable to attacks. Researchers showed that it's possible to remotely take control over autonomous vehicles, implanted medical devices were manipulated, voting machines compromised and of course all sorts of other "smart" devices... more
The evolution of the internet is anchored in the phenomenon of new technologies replacing their older counterparts. But technology evolution can be just as much about building upon what is already in place, as it is about tearing down past innovations. Indeed, the emergence of cloud computing has been powered by extending an unlikely underlying component: the more than 30-year-old global Domain Name System (DNS). more
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