We looked at our web stats for the past year recently and found we'd had visits from every country except two, NK being one of the two not logged. (I forget the other, and I don't recall what definition of "all the countries" was used.)
So I'm thinking not common. Anyone else seen or conspicuously not seen hits from NK?
I looked a bit closer at my web server logs and the IP addresses matched one of the ranges described in the blog post. My application is translated to Korean by end-users, and reading the logs I see that the user downloaded it, read some tutorials in the documentation and some months later downloaded the latest version. I'm not sure why it surprised me that there visitors from NK when I saw it yesterday, it makes sense when I think about it. I already know that my software happens to be used by governments in several dictatorships (yay for open source.)
Well look what the author did: just scan the whole country. And I personally know people who scanned the whole Internet on certain ports (so that's not that big a deal). I would be surprised if North Korea didn't do entire Internet sweeps themselves.
