DPRK’s Internet outage lasted almost two days
The Internet disruption that affected North Korea’s Internet link earlier this week lasted almost two days, an Internet monitoring company said Friday.
It began just before 0100 GMT on Wednesday — that’s 10am local time — and continued for much of the next day and a half. It then took several hours for traffic levels and response times to get back to normal, said Internet network monitoring company Renesys.
The country typically relies on a link via China Unicom to connect to the rest of the world and this disappeared from global routing tables when the outage began, said Renesys. Routing tables are constantly updated virtual road maps to the Internet that are used to route data packets.
Soon after, the routing tables began showing again links into North Korea but with part of the country’s connection switched over to a back-up satellite Internet connection via Intelsat.
However, that didn’t help traffic.
Here’s a graph of latencies — the amount of time it takes a server to respond. The beginning of the outage is pretty obvious and its effect is obvious too, Latencies immediately climbed, in some cases to more than 10 times normal. What the chart doesn’t show is the connections that never succeeded.
There were a few periods when connectivity returned to near-normal levels but things didn’t begin returning until midway through Thursday GMT, which is late evening local time in Pyongyang. By Friday morning, latency was back to normal.
Renesys didn’t offer an explanation of what might have been behind the problems. KCNA has blamed the U.S. and its allies for attacking its network, although there’s no evidence either way.
This graphic shows that North Korea’s entire Internet disappeared from global routing tables at least once during the outage.
|Print article||This entry was posted by Martyn Williams on March 16, 2013 at 10:33, and is filed under Hacking, Internet, Security, Websites. Follow any responses to this post through RSS 2.0. You can leave a response or trackback from your own site.|
No comments yet.
about 4 months ago - 8 comments
A couple of weeks ago I reported that satellite monitors had found a new feed of Korean Central Television on Intelsat 21, a satellite above the Atlantic that covers all of the Americas and west Europe. Today I had a chance to check it out. Related posts: North Korean TV expands satellite transmissions KCTV updates its…
about 5 months ago - 1 comment
Korean Central Television has appeared on a satellite above the Atlantic Ocean, extending coverage of its live signal to the Americas and Europe. The TV channel, which is North Korea’s main state-run TV service, began broadcasting on Intelsat 21 earlier in April, according to monitoring reports. KCTV has been available for more than a decade…
about 2 years ago - 1 comment
Tuesday’s series of denial of service attacks on major North Korean websites caused delays and frustration for legitimate users but doesn’t appear to have been as large or successful as the first round of attacks in late March and early April this year. Analysis by NorthKoreaTech.org of data related to the attacks shows the so-called…
about 2 years ago - 4 comments
Hot on the heels of a series of attacks that have seen its Internet connectivity severely disrupted, the DPRK appears to be adding an additional route through which it links to the global Internet. The new link began appearing in Internet addressing tables on Monday and connects from Star, the country’s sole Internet service provider,…
about 2 years ago - 6 comments
A cyber attack on three of South Korea’s major broadcasters and several of its major banks appears to have been caused by a relatively unsophisticated piece of software, security researchers said Wednesday. [Story updated, see below] The attacks, which began at around 2pm local time on Wednesday (5:00 UTC) left desktop and laptop computers unable…
about 2 years ago - 3 comments
An apparently sophisticated and coordinated cyber attack has caused widespread disruption to computer networks and three of South Koreas largest broadcasters and two of the country’s banks. The attack first showed itself at 2pm on Wednesday when computers at KBS, MBC and YTN shutdown. Upon restarting, the computers displayed error messages saying they were unable…
about 2 years ago - 1 comment
Last week’s Internet outage that pushed North Korean websites offline for almost two days was probably caused by a problem inside the country, not on an external connection, an Internet researcher said Monday. “The impacted equipment was within North Korea,” said Doug Madory, a senior research engineer at Renesys. On Friday, he published a detailed…
about 2 years ago - 2 comments
Just when you thought it couldn’t get any more bizarre than Dennis Rodman hugging Kim Jong Un, the operators of The Pirate Bay site claimed Monday that they are now running from the North Korean Internet. The Pirate Bay is one of the Internet’s longest surviving pirate sites. It links to Bit Torrent files of…