Feeds

BIND 9 upgrade behind BT DNS issues

Webmasters, check your configs

  • alert
  • submit to reddit

3 Big data security analytics techniques

Several domain hosting companies have reported DNS errors coming from BT's doors in recent weeks. After failing to get any explanation from the monster telco, some contacted The Register in frustration.

Perhaps BT would be more co-operative with us. Err no.
But following our article earlier this week, we think we now have the definitive reason for the DNS problems experienced by many in the last couple of weeks.

BT has upgraded some of its name servers to BIND 9 which is stricter in enforcing standards and doesn't overlook configuration errors made by many hosting companies, which are the real cause of the problem.

In the case of NSDesign's name servers, for example, problems arose because it failed to contain name server records for their domain defined within the domain, counting on inheritance from the ".net" Top Level Domain. That's not tolerated in BIND 9.

Some of BT's DNS servers are running older versions of BIND which are less sensitive to misconfigurations of remote servers, so surfers connecting through BT servers running BIND 8 wouldn't see a problem. Trouble -free connections were also secured when surfers logged on through ISPs other than BT, again because DNS lookups went through servers running older versions of BIND.

BT outsources the running of their DNS servers, which seems to be reason why it proved so frustratingly hard to get an answer on our query. Further muddying the waters were admissions by BT support staff, when pressed, that the telco could be to blame for the problem.

Our story illustrated an important point for Web admins to bear in mind as use of BIND 9 becomes more commonplace.

Just to reiterate, this problem didn't just apply to site hosted by NSDesign and uksecurewebhosting.net but to some of the biggest tech sites on the net.

Thanks to all those who wrote in to set the record straight. ®

External Links

Posting by Cricket Liu, of DNS specialists Men & Mice, to BIND 9 user group which explains the issue in more technical detail

3 Big data security analytics techniques

More from The Register

next story
Obama allows NSA to exploit 0-days: report
If the spooks say they need it, they get it
Samsung Galaxy S5 fingerprint scanner hacked in just 4 DAYS
Sammy's newbie cooked slower than iPhone, also costs more to build
Putin tells Snowden: Russia conducts no US-style mass surveillance
Gov't is too broke for that, Russian prez says
Snowden-inspired crypto-email service Lavaboom launches
German service pays tribute to Lavabit
Mounties always get their man: Heartbleed 'hacker', 19, CUFFED
Canadian teen accused of raiding tax computers using OpenSSL bug
One year on: diplomatic fail as Chinese APT gangs get back to work
Mandiant says past 12 months shows Beijing won't call off its hackers
Call of Duty 'fragged using OpenSSL's Heartbleed exploit'
So it begins ... or maybe not, says one analyst
Heartbleed exploit, inoculation, both released
File under 'this is going to hurt you more than it hurts me'
prev story

Whitepapers

Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Top three mobile application threats
Learn about three of the top mobile application security threats facing businesses today and recommendations on how to mitigate the risk.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.