Web Admin Blog Real Web Admins. Real World Experience.

25Jun/091

Introduction to Cloud Computing and Virtualizaton Security

Today the Austin ISSA and ISACA chapters held a half-day seminar on Cloud Computing and Virtualization Security.  The introduction on cloud computing was given by Vern Williams.  My notes on this topic are below:

5 Key Cloud Characteristics

  • On-demand self-service
  • Ubiquitous network access
  • Location independent resource pooling
  • Rapid elasticity
  • Pay per use

3 Cloud Delivery Models

  • Software as a Service (SaaS): Providers applications over a network
  • Platform as a Service (PaaS): Deploy customer-created apps to a cloud
  • Infrastructure as a Service (IaaS): Rent processing, storage, etc

4 Cloud Deployment Models

  • Private cloud: Enterprise owned or leased
  • Community cloud: Shared infrastructure for a specific community
  • Public cloud: Sold to the public, Mega-scale infrastructure
  • Hybrid cloud: Composition of two or more clouds
  • Two types: internal and external
  • http://csrc.nist.com/groups/SNS/cloud-computing/index.html

Common Cloud Characteristics

  • Massive scale
  • Virtualization
  • Free software
  • Autonomic computing
  • Multi-tenancy
  • Geographically distributed systems
  • Advanced security technologies
  • Service oriented software

Pros

  • Lower central processing unit (CPU) density
  • Flexible use of resources
  • Rapid deployment of new servers
  • Simplified recovery
  • Virtual network connections

Cons

  • Complexity
  • Potential impact of a single component failure
  • Hypervisor security issues
  • Keeping virtual machine (VM) images current
  • Virtual network connections

Virtualization Security Concerns

  • Protecting the virtual fabric
  • Patching off-line VM images
  • Configuration Management
  • Firewall configurations
  • Complicating Audit and Forensics