Feeds

When will Microsoft next run out of US IPv4 addresses for Azure?

Redmond gives some servers a Brazilian, promises all the action is on American soil

Application security programs and practises

Updated Microsoft's Azure cloud service has run out of occasionally runs out of US-based IPv4 addresses.

Redmond 'fessed up to the issue in a blog post in which it says users have been asking it why, when they use Azure-hosted VMs, they find themselves redirected to websites localised for other nations. The post offers a screen shot of Yahoo! Brazil, in Portuguese, to illustrate the situation.

Redmond's answer is was that it can't get its hands on any more of the USA's IPv4 addresses, as they've all been handed out.

“The result is that we will have to use IPv4 address space assigned to a non-US region to address services which may be in a US region,” the post continues.

The post emphasises that just because Microsoft gives your VM a Brazilian or other foreign address, that doesn't mean you lose the legal protections that come with having your server on US soil. Or don't come, if one E. Snowden, late of Moscow, is correct.

Azure users are concerned enough about this that Microsoft says it is “... currently working with a few major IP geo-location database companies to update the location of these IPs which should help alleviate the issues this may be causing.” The result, presumably, will be that Microsoft-owned non-US IP addresses will no longer point to localised web sites.

Which is rather nice, but also raises questions about why Azure is relying on Ipv4 and how Redmond let itself run out of IPv4 addresses. The latter question looks easy to answer: back when Microsoft was buying IPv4 it probably could not foresee the need for quite as many addresses as cloud computing requires.

We've asked Microsoft to offer an answer to the the first question.

Updated to add

Microsoft contacted El Reg regarding this story after it was published, and offered two nuggets of information. The first is that it has updated its post with the following:

The below blog misstated the situation around Microsoft Azure’s IPv4 address space in US regions. Currently, Microsoft has IPv4 space in US regions. That said, inventory space is a dynamic situation. In the past some customers were assigned non-US IPv4 addresses as a result of limited inventory.

The second nugget comes from the Azure FAQ that states, in part, that "foundational work to enable IPv6 in the Azure environment is well underway. However, we are unable to share a date when IPv6 support will be generally available at this time". ®

Eight steps to building an HP BladeSystem

More from The Register

next story
Sysadmin Day 2014: Quick, there's still time to get the beers in
He walked over the broken glass, killed the thugs... and er... reconnected the cables*
Apple fanbois SCREAM as update BRICKS their Macbook Airs
Ragegasm spills over as firmware upgrade kills machines
SHOCK and AWS: The fall of Amazon's deflationary cloud
Just as Jeff Bezos did to books and CDs, Amazon's rivals are now doing to it
Amazon Reveals One Weird Trick: A Loss On Almost $20bn In Sales
Investors really hate it: Share price plunge as growth SLOWS in key AWS division
EU's top data cops to meet Google, Microsoft et al over 'right to be forgotten'
Plan to hammer out 'coherent' guidelines. Good luck chaps!
US judge: YES, cops or feds so can slurp an ENTIRE Gmail account
Crooks don't have folders labelled 'drug records', opines NY beak
Auntie remains MYSTIFIED by that weekend BBC iPlayer and website outage
Still doing 'forensics' on the caching layer – Beeb digi wonk
Manic malware Mayhem spreads through Linux, FreeBSD web servers
And how Google could cripple infection rate in a second
prev story

Whitepapers

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
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.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.