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SDN Journal Authors: Elizabeth White, Dana Gardner, Chris Janz, Michael Jannery, Lori MacVittie

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Houston, We Have Cloud

The data centers of the future may look more like NASA ground control – governance inside, resources out

The data centers of the future may look more like NASA ground control – governance inside, resources out

One theme has remained consistent throughout the evolution of cloud thus far - enterprise IT wants to retain control of both its data and access to to it.

This is not an unreasonable demand. After all, it is enterprise IT - and its leadership - that will pay the price should customer data leak or regulations not complied with. Despite the growing view that cloud security is a joint, shared responsibility between customer and provider, it is enterprise IT that must put into place the mechanisms for both controlling and proving control over data and access, not cloud providers or integrators. The provider can offer services designed to provide that control, but it is not the one that must implement the polices or report on their effectiveness.

Amazon throws down the gauntlet for enterprise IT

While a collaboration and file-sharing app has been moved to AWS, access controls have to remain in-house, according to Oliver Alvarez, lead enterprise security architect for the World Bank's International Finance Corporation.

"We need to maintain control and custodianship of information," he said.

Access control by its nature must include identity management. Without the means to manage the credentials and map authorization of access to data and services to those credentials, control is lost. If customer data is the lifeblood of an organization, identity stores are the heart's valves, controlling when and where that data is moved and by whom.

TWO EMERGING ARCHITECTURES

Two architectures for control over identity and access are beginning to emerge, both having a common premise - identity stores are local, data and services are remote. In one architecture a provider - usually of a SaaS solution - deploys a virtual appliance on premise that brokers identity. This essentially enables LDAP/AD integration between the data center and the SaaS. In the second, a strategic control layer acting as a cloud services broker provides integration between environments using standard protocols, such as SAML, to enable control over authentication and authorization of cloud services.

The appliance model is an extension of agent-based services, merely expanded to the data center level. There are some concerns that go along with this model, chiefly that an external entity has control of an agent within the data center but in general this models appears to enjoy market acceptance, especially in cases where a standards-based approach is unavailable.

The alternative, standards-based model, uses the same brokering model but the broker is under the control of enterprise IT, not the provider. It relies on the same principles of abstraction we've come to recognize with virtualization and SDN as being beneficial to agility in the network and data center, putting a layer of control between resources and users so as to enable more flexibility in not just access control and identity management but in making routing decisions with respect to those resources.

That layer of control within enterprise IT is unlikely to go away for the very reasons cited above: control (governance) is a legal and operational necessity for enterprise IT. Cloud providers who fail to recognize this need and move to provide services supportive of that necessity are merely shooting themselves in the foot with respect to gaining more traction with enterprise customers.

Cloud gateways and broker services are going to end up enabling this architecture on the enterprise side. It is in providers' best interests to make these architectures as painless to implement as possible.

Read the original blog entry...

More Stories By Lori MacVittie

Lori MacVittie is responsible for education and evangelism of application services available across F5’s entire product suite. Her role includes authorship of technical materials and participation in a number of community-based forums and industry standards organizations, among other efforts. MacVittie has extensive programming experience as an application architect, as well as network and systems development and administration expertise. Prior to joining F5, MacVittie was an award-winning Senior Technology Editor at Network Computing Magazine, where she conducted product research and evaluation focused on integration with application and network architectures, and authored articles on a variety of topics aimed at IT professionals. Her most recent area of focus included SOA-related products and architectures. She holds a B.S. in Information and Computing Science from the University of Wisconsin at Green Bay, and an M.S. in Computer Science from Nova Southeastern University.

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