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In my department, we block about 92% of our total email (around 2.5 billion per day) at the network edge without accepting the message. When we do that, we don't see any traffic from that IP anymore and don't keep stats on it due to the overwhelming volume of mail. However, we do keep stats on mail that we block with our content filter. I decided to go and calculate how much spam we receive from each country by mapping the source IP back to its source country... more
In light of recent announcements regarding Cameroon's country code Top-Level Domain, .CM, being opened to public registration, Tresa Baldas reports on Law.com: "Trademark attorneys are warning companies about a new target for cybersquatters known as '.cm,' which is the country code -- or top level domain -- for the West African nation of Cameroon. The dot-cm domain is a hot target for scammers, they say, due to 'cm' being a common typographical error for 'com' in the popular dot-com domain. Attorneys say this is significant to brand owners because Internet users searching for brand owners' Web sites frequently mistype dot-com as dot-cm and wind up on a bogus site. Not only is Web traffic lost, they say, but a brand name can get diluted or tainted along the way." (Also see, Nation of Cameroon Typo-Squats the Entire .com Space from 2006) more
A report released today by Public Knowledge points out that their recent analysis indicates filtering Internet content, as advocated by media companies, will not be effective and in fact harmful to the Internet. An accompanying 60-page whitepaper contains the full report including a number of reasons why the user of copyright filters should not be allowed, encouraged or mandated on U.S. Internet Service Provider (ISP) networks. more
Nguyen Minh Duc, senior security director at Bach Khoa Internetwork Security (Bkis), says that the source of recent cyberattack against US and South Korean government websites was not North Korea -- as widely reported -- but UK. Based on Bkis analysis, a report today by Nguyen Minh Duc says that a master server located in UK was found to control the 8 Command and Control servers responsible for the series of cyberattacks last week.
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This post isn't about -- or isn't only about -- the use of computer technology to commit crimes. It's more about the use of computer technology to commit war. A few weeks ago, I was part of a conversation about the legal issues cyberwarfare raises. We were talking about various scenarios -- e.g., a hostile nation-state uses cyberspace to attack the U.S. infrastructure by crippling or shutting down a power grid, air traffic control systems, financial system, etc. Mostly, we were focusing on issues that went to the laws of war, such as how and when a nation-state that is the target of a cyberattack can determine the attack is war, rather than cybercrime or cyberterrorism. more
Over the past few weeks I have been seeing reports that some ISP's are actually subverting DNS queries to their own DNS server. Oh the humanity! What this means is that when you (your computer) does a UDP or TCP Port 53 DNS query the ISP is intercepting that and directing it to their own servers. Has anyone been told by their ISP that they are doing this? No? I didn't think so... more
Since my last post about DNS subversion we have had some good feedback. We had 29 responses, I agree a small sample, but what we found is very interesting. Let's remind ourselves of what we are looking at? Does your ISP redirect DNS queries? Specifically, if you try to make a port 53 UDP or TCP connection to a server outside of your ISP's network does it get there? more
In a post today on Comcast's blog, Chris Griffiths, DNS Engineering Manger, has informed customers that they have begun to role a DNS redirection service -- a controversial service offered by several other ISPs over the years to redirect mistyped URLs to ad-based pages instead of a typical 404 error page. The service called "Domain Name Helper Service" is being launched as a market trial in Arizona, Colorado, New Mexico, Oregon, Texas, Utah, and Washington according to the company. more
The Canadian Press reports: "Most Canadians support the idea of Internet traffic management as long as all users are treated fairly, a new poll suggests. The Canadian Press Harris-Decima poll found only about one in five of those surveyed had heard of Internet traffic management or "traffic shaping," a contentious issue now before the federal regulator... Sixty per cent of survey respondents said they found the practice reasonable as long as customers are treated fairly, while 22 per cent said Internet management is unreasonable regardless." more
As you certainly noticed, a lot of traditional media has recently been focusing on click fraud. Is it as big of an issue as it is made out to be, compared to traditional advertising? Unfortunately Eytan Elbaz of Google will not answer this question with statistics, but he lets us know that Google has the problem under control. Here are some notes based on the Click Fraud Session at the Targeted Traffic Conference in Hollywood, Florida last week. more
The latest report on young people's online music-finding habits from consumer research company The Leading Question has attracted a fair amount of coverage for its headline finding that UK teenagers use of filesharing services has dropped by a third... Music industry pollsters will inevitably look for a silver lining in the cloud of consumer behaviour, and a focus on the growth of legal services is to be expected. But even with that caveat in mind, there has clearly been a shift in behaviour as more young people find licensed ways to listen to the music they want, watching YouTube videos, streaming songs through MySpace and Spotify and generally using legal avenues to find and enjoy the music of new bands like Florence and the Machine. more
VeriSign makes a great deal of money from the .COM and .NET registries. Can we tell how much they make, and how much that might change if the CFIT lawsuit succeeds? It's not hard to make some estimates from public information. The largest gTLD registry that VeriSign doesn't run is .ORG, which was transferred a few years ago to the Public Internet Registry (PIR) which pays Afilias to run the registry, and uses whatever is left over to support the Internet Society (ISOC)... more
Why do we run content filters at the recipient's side? Paul Graham's Plan for Spam introduced them that way. After several years, we can say that plan doesn't work very well. Email has become much less reliable. One way to recover reliability, at least between trusted parties, is to run filters at the sender's side. Let's look at the diagram in more detail... more
Yesterday I said that the original motivations for adding new TLDs were to break VeriSign's monopoly on .COM, and to use domain names as directories. Competitive registrars broke the monopoly more effectively than any new domains, and the new domains that tried to be directories have failed. So what could a new TLD do? more
ICANN's Sydney meeting has come and gone, with the promised flood of new Top-Level Domains (TLDs) claimed to be ever closer to reality. Does the world need more TLDs? Well, no. Way back in the mid 1990s, it seemed obvious that Internet users would use the DNS as a directory, particularly once early web browsers started to add .COM to words typed in the address bar. This led to the first Internet land rush, with heavy hitters like Procter and Gamble registering diarrhea.com in 1995... more
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