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..."
A year later: A look back at McColo
"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."
In a new report, the U.S. Government Accountability Office reveals that the “Department of Defense uses 8- inch floppy disks in a legacy system that coordinates the operational functions of the nation’s nuclear forces.” That floppy format was developed in the late 1960s and was obsolete by the 1980s. I wonder if the DoD saves […]
In 1989, Canadian activist, engineer and thinker Ursula Franklin gave a series of extraordinary lectures on the politics of technology design and deployment called “The Real World of Technology.”
The sale of Time Warner Cable to Charter Communications is completed today, and former TWC customers (including me) can probably look forward to a whole new era of crappy service, Netflix throttling, and horrible customer service experiences under our new broadband overlords.
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Jared Sinclair developed the RSS reader app Unread, which made $10,000 in its first 24 hours on the iOS market. And we’ve all heard the story of Flappy Bird developer Dong Nguyen, whose creation was reportedly earning $50,000 a day at the height of its 2013 explosion. While those are rare examples, they’re also testament to the […]