When a block of IP addresses or a collection of domain names becomes associated with bad action -- spamming, jabbering, denial-of-servicing -- various ad-hoc Internet groups will add it to a blacklist of "rogue IPs" or "badware domains" that are blocked at a very low level in the network.
The problem is that there doesn't seem to be any way to readily diffuse an "all clear" signal to everyone who follows along with this block, which means that gradually, the net is acquiring "slums" -- blocks of useful space that can't be occupied by legitimate users because someone bad once lived there and now no one will accept their traffic.
The Washington Post's Security Fix visits this question -- it's a compelling problem when you think of it. Bad actors will continue to move from blocked IPs to fresh ones, and if we never release the blocked sections, eventually we'll have shut down a very large chunk of IP space indeed.
"The problem is once an address block gets so polluted and absorbed into all these blocklists, it's difficult to get off all of them because there is no central blocking authority," said Paul Ferguson, an advanced threat researcher at Trend Micro. "That space won't be toxic for all time to come, but certainly it is going to be tainted for whoever ends up with it..."
"What you'll find is some blacklists out there are derivatives of other lists, and it's hard to get those cleaned up," Bertier said, recalling a case last year in which a customer was given a swath of Internet addresses, only to find it was impossible to send e-mail from that space. "Typically in those cases, we'll work with the customers to get them new space and mark that allocation as something that really shouldn't be used for e-mail."
A year later: A look back at McColo
In the year 2,000, Susan Potter, then 72, donated her body to medicine. After Potter died, scientists froze her corpse, sliced it into 27,000 slivers thinner than a human hair, photographed each slice, and created “the world’s most advanced virtual cadaver using the highest-quality imagery of an entire human body in existence.” Not only is […]
Today in the Mojave desert, Virgin Galactic had a successful test flight that reached 50 miles above the surface of the earth, meeting the Federal Aviation administration’s definition of space. This places the company one step closer to the long-awaited goal Richard Branson promised: space tourism. SpaceShipTwo, welcome to space. — Virgin Galactic (@virgingalactic) December […]
While researchers continue attempts to build practical insect-size flying robots, engineers at the University of Washington have prototyped a backpack for real bees that outfits the insects with sensing, computing, and wireless networking capabilities. From UW News: “We decided to use bumblebees because they’re large enough to carry a tiny battery that can power our […]
For the true audio enthusiast, there’s a lot of difference between putting on some songs “for background music” and a true listening experience. For the latter, there’s nothing like a pair of sturdy headphones and the powerful speakers that come with them. And the wireless variety doesn’t get much more powerful than the TREBLAB Z2 […]
Digital or analog, there’s a path of least resistance for any project. Finding that path is what the Agile methodology is all about, which is why proficiency in it is a must for any project management position – and the paycheck that comes with it. And the quickest path to learning Agile? The Agile Project […]
Everybody’s flown a paper airplane. But what if you could fly on a paper airplane? Until we invent shrink-ray technology, the PowerUp X FPV Video Paper Airplane Kit will have to do – but it’s as fun as that sounds and more. The original version of this creative toy added drone tech to the old, […]