wood - The Case for Enterprise-Ready Virtual Private Clouds...

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Unformatted text preview: The Case for Enterprise-Ready Virtual Private Clouds Timothy Wood Alexandre Gerber K.K. Ramakrishnan Prashant Shenoy Jacobus Van der Merwe University of Massachusetts Amherst AT&T Labs - Research { twood,shenoy } @cs.umass.edu { gerber,kkrama,kobus } @research.att.com Abstract Cloud computing platforms such as Amazon EC2 provide cus- tomers with flexible, on demand resources at low cost. How- ever, while existing offerings are useful for providing basic computation and storage resources, they fail to provide the se- curity and network controls that many customers would like. In this work we argue that cloud computing has a great potential to change how enterprises run and manage their IT systems, but that to achieve this, more comprehensive control over network resources and security need to be provided for users. Towards this goal, we propose CloudNet, a cloud platform architecture which utilizes virtual private networks to securely and seam- lessly link cloud and enterprise sites. 1 Introduction Cloud computing enables enterprises large and small to manage resources better some because they no longer need to invest in local IT resources and instead can lease cheaper, on-demand resources from providers, and oth- ers because they can utilize the flexibility of cloud re- sources to dynamically meet peak demand without in- vesting in in-house resources. Cloud computing is a natural fit for enterprise customers since it enables out- sourcing of another set of non core competencies: IT infrastructure selection, ordering, deployment, and man- agement. Cloud computing allows enterprises to obtain as much computation and storage resources as they re- quire, while only paying for the precise amount that they use. Since cloud platforms rely on virtualization, new re- sources can be quickly and dynamically added to a cus- tomers resource pool within minutes. From a cloud com- puting service providers perspective, server virtualiza- tion allows them to flexibly multiplex resources among customers without needing to dedicate physical resources individually. These features have driven the growth of commercial cloud computing services, making them in- creasingly popular and economical. However, current cloud computing services need to further evolve to fully meet the needs of businesses. It is highly desirable that cloud resources be seamlessly in- tegrated into an enterprises current infrastructure with- out having to deal with substantial configuration, address management, or security concerns. Instead, current com- mercial solutions present cloud servers as isolated enti- ties with their own IP address space that is outside of the customers control. The separation of cloud and en- terprise resources increases software and configuration complexity when deploying services that must communi- cate with an enterprises private network. This can lead to security concerns since enterprise customers must utilize IP addresses on the...
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This note was uploaded on 01/27/2012 for the course CS 600 taught by Professor Smith,r during the Winter '08 term at Alabama.

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wood - The Case for Enterprise-Ready Virtual Private Clouds...

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