Trusted End Host Monitors for Securing Cloud Datacenters Alan Shieh - - PowerPoint PPT Presentation

trusted end host monitors for securing cloud datacenters
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Trusted End Host Monitors for Securing Cloud Datacenters Alan Shieh - - PowerPoint PPT Presentation

Trusted End Host Monitors for Securing Cloud Datacenters Alan Shieh Srikanth Kandula Albert Greenberg Cloud workload is dynamic and hostile Traditional datacenters Cloud datacenters Infrastructure supports small # of


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SLIDE 1

Trusted End Host Monitors for Securing Cloud Datacenters

Alan Shieh†‡ Srikanth Kandula‡ Albert Greenberg‡

† ‡

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SLIDE 2

Cloud workload is dynamic and hostile

Traditional datacenters Infrastructure supports small # of internal clients

– Software and topology change slowly – Can exploit natural network chokepoints – Feasible to audit app code

Cloud datacenters Infrastructure is shared among many untrusted tenants

– Rapidly changing config – Chokepoints torque network topology – Too many apps to audit!

Need new approach

  • Scaling requires more agility & flexibility
  • Exploits more likely
  • Exploits can use cloud resources to do more damage
  • Attack other tenants
  • External/internal DoS
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Insight: Cloud datacenters can help!

  • Cloud data centers tend to be:

– Centrally controlled – Homogeneous hardware & software

  • Clean slate feasible

– Have strongly isolated, trusted functionality

  • VMs, TPMs, management coprocessors
  • Our approach: Trust end host monitors

Push enforcement from network to end hosts

– Distributed across many hosts – Runs in trusted layers

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In-network enforcement

OS Hypervisor Trusted component OS Hypervisor OS Hypervisor OS Hypervisor

Allow to

Deep Packet Inspection Appliance

DoS protection

Firewall

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SLIDE 5

Trusted end host monitors

Central Controller Trusted component Hypervisor Trusted NIC OS

DoS protection Allow to

Hypervisor Trusted NIC OS

DoS protection Allow to

Hypervisor Trusted NIC OS

DoS protection Allow to Shutoff Trusted Alarm

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Summary

  • Cloud DCs have unique challenges & opportunities

– Address, exploit these with trusted end host monitors

  • Runs on commodity network & end host hardware

– Simplifies controller design – Improves scalability – Reduces cost

  • Status: Built prototype from VMs, trusted NIC

(Intel AMT)