Feeds

Missing dot sends Sweden tumbling off internet

DNS doldrums for mournful Scandies

The Essential Guide to IT Transformation

Sweden effectively fell off the internet last night when maintenance to Domain Name Systems damaged every single .se web address.

The problem happened at quarter to ten last night and took just less than an hour to fix.

But some problems remained because the address data is cached externally by ISPs - these servers had to be flushed - some ISPs outside Sweden, unaware of the problem, may still be having problems finding addresses ending in .se.

An error in a script used to update the .se domain led to an error being introduced into every single domain name. The software failed to add the fullstop to .se addresses. This meant the system failed to understand that .se was the top level domain.

According to pingdom - the Swedish company which monitors websites' uptime - the problem was made worse because the duff data was then cached by external ISPs.

Pingdom said it was not uncommon for individual sites to have DNS problems, but far more unusual for an entire country to get wiped out. It said the effects were serious in Sweden, with 900,000 .se addresses, but would have been far worse if the 80 million .com addresses had been corrupted.

The Swedish registry, the Internet Infrastructure Foundation, said the problem was caused by an incorrect zone file used during planned maintenance. The firm's testing procedures did not pick this up, but its surveillance system did once the software was in use.

Once this happened a new zone file was created and distributed within an hour. The Internet Infrastructure Foundation said ISPs still having trouble should flush or restart machines. There's more advice here.

IIF is investigating to see if its internal procedures need to be improved. ®

Build a business case: developing custom apps

More from The Register

next story
Scotland's BIG question: Will independence cost me my broadband?
They can take our lives, but they'll never take our SPECTRUM
iWallet: No BONKING PLEASE, we're Apple
BLE-ding iPhones, not NFC bonkers, will drive trend - marketeers
Trying to sell your house? It'd better have KILLER mobile coverage
More NB than transport links to next-gen buyers - study
Auntie remains MYSTIFIED by that weekend BBC iPlayer and website outage
Still doing 'forensics' on the caching layer – Beeb digi wonk
Speak your brains on SIGNAL-FREE mobile comms firm here
Is goTenna tech a goer? Time to grill CEO, CTO
NBN Co adds apartments to FTTP rollout
Commercial trial locations to go live in September
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Backing up Big Data
Solving backup challenges and “protect everything from everywhere,” as we move into the era of big data management and the adoption of BYOD.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.