Cyberattack / Most Commented

Port 25 Blocking, or Fix SMTP and Leave Port 25 Alone for the Sake of Spam?

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»

Most Abusive Domain Registrations are Preventable

As the WHOIS debate rages and the Top-Level Domain (TLD) space prepares to scale up the problem of rogue domain registration persists. These are set to be topics of discussion in Costa Rica. While the ICANN contract requires verification, in practice this has been dismissed as impossible. However, in reviewing nearly one million spammed domain registrations from 2011 KnujOn has found upwards of 90% of the purely abusive registrations could have been blocked. more»

DNSSEC: Once More, With Feeling!

After looking at the state of DNSSEC in some detail a little over a year ago in 2006, I've been intending to come back to DNSSEC to see if anything has changed, for better or worse, in the intervening period... To recap, DNSSEC is an approach to adding some "security" into the DNS. The underlying motivation here is that the DNS represents a rather obvious gaping hole in the overall security picture of the Internet, although it is by no means the only rather significant vulnerability in the entire system. One of the more effective methods of a convert attack in this space is to attack at the level of the DNS by inserting fake responses in place of the actual DNS response. more»

An Attack on DNS is an Attack on the Internet

On Saturday Aug 7th, DNS provider DNS Made Easy was the target of a very large denial of service attack. As far as can be determined the total traffic volume exceeded 40 Gigabit/second, enough to saturate 1 million dialup Internet lines. Several of DNS Made Easy's upstream providers had saturated backbone links themselves. There are indications that not only DNS Made Easy suffered from this attack, but the Internet as a whole. more»

Spam Fighting: Lessons from Jack Bauer?

As I blogged about several months ago, as did numerous other anti-spam bloggers, David Ritz was sued by Jeffrey Reynolds and a judge in North Dakota agreed with Reynolds. At the heart of the case was that Ritz engaged in anti-spam activities using techniques known only to a small subset of advanced computer users, and used these techniques maliciously against Reynolds... Back in the olden days of spam fighting, some anti-spammers used to use malicious techniques against spammers in order to shut them down... more»

A Question of DNS Protocols

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»

Can We Stop IP Spoofing? A New Whitepaper Explores the Issues

In March 2013, Spamhaus was hit by a significant DDoS attack that made its services unavailable. The attack traffic reportedly peaked at 300Gbps with hundreds of millions of packets hitting network equipment on their way. In Q1 2015, Arbor Networks reported a 334Gbps attack targeting a network operator Asia. In the same quarter they also saw 25 attacks larger than 100Gbps globally. What is really frightening about this is that such attacks were relatively easy to mount. more»

Kidnapping, Theft and Rape Are Not "Cyber" Crimes

Kidnap. Rape. There are no lesser words that can be used to describe what happened to the daughter of an anti-spam investigator in Russia. His daughter was recently released, according to Joseph Menn's recent article on Boing Boin, after having been kidnapped from her home five years ago, fed drugs, and made to service men, as a warning to ward off further investigations. The criminals behind these vicious acts were also responsible for large spamming organization associated with Russian Mob activity. more»

Cyberwar vs No Cyberwar

I was browsing CircleID the other day and came across Bruce Schneier's article on cyberwar. Schneier's article, and the crux of his point, is that the term cyber war and the threat of cyber warfare has been greatly exaggerated. The real problem in cyberspace is not the threat of cyber warfare wherein a foreign government, or possibly non-state actor, conducts a cyber attack on another nation. more»

Why Can't We Make the Internet Secure?

In a discussion about a recent denial of service attack against Twitter, someone asked, "Some class of suppliers must be making money off of the weaknesses. Anybody out there have a prescription for the cure?" Sure, but you're not going to like it. The Internet was originally a walled garden, where its operators knew who all the users were and could eject anyone who misbehaved... more»

Which Domains Stand the Strongest Against Phishing Attacks?

The latest Anti-Phishing Working Group (APWG) Global Phishing Survey, which analyzed over 100,000 phishing attacks in the first half of 2014, examines the progress that top level domains (TLDs) are making in responding to phishing attacks that use their TLDs. The report finds the .INFO domain has the lowest average phishing uptimes as compared to other TLDs, such as .COM and .NET. more»

DNS Reflection/Amplification Attack: Proved

Last year there was a "threat" by anonymous group to black out Internet by using DNS Reflection/Amplification attack against the Internet DNS Root servers. I even wrote a little article about it: "End of the world/Internet". In the article I was questioning if this was even possible and what was needed as general interest and curiosity. Well, looking at the "stophaus" attack last week, we are getting some answers. more»

Attack Seriously Slows Two Internet Root Servers

Online attackers have briefly disrupted service on at least two of the 13 "root" servers that are used to direct traffic on the Internet.

The attack, which began Tuesday at about 5:30 a.m. Eastern time, was the most significant attack against the root servers since an October 2002 distributed denial of service (DDOS) attack, said Ben Petro, senior vice president of services with Internet service provider Neustar Inc. more»

Domain Registrars Releasing Suspended Domains to Attackers

Mary Landesman of ScanSafe reports: "A new outbreak of SQL attacks began on the 8th. Not that they ever really go away, but new waves replace the old ones. The attackers are using a much larger number of domains than seen in previous months. Just 11 days into June, and already 54 of these domains have been observed. Many of these are previously suspended domains that registrars have released back to the attackers. more»

End of the World/Internet on 31-March-2012?

Well... Maybe not the world, but the Internet it seems. According to a Pastebin letter, Anonymous announced they will black-out Internet on 31st of March. They even explained how to do it by attacking the DNS Root Servers on Internet using a reflected amplification attack. If this is successful, the root DNS servers will become unresponsive and cannot handle any other requests... more»

Industry Updates

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Introducing the Verisign DNS Firewall

3 Key Steps for SMBs to Protect Their Website and Critical Internet Services

Verisign Mitigates More DDoS Attacks in Q1 2015 than Any Quarter in 2014