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Trusted End Host Monitors for Securing Cloud Datacenters

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 is shared among many untrusted tenants Rapidly changing config

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Trusted End Host Monitors for Securing Cloud Datacenters

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  1. Trusted End Host Monitors for Securing Cloud Datacenters Alan Shieh†‡ SrikanthKandula‡ Albert Greenberg‡ † ‡

  2. Cloud workload is dynamic and hostile Traditional datacenters Cloud datacenters Infrastructure is shared among many untrusted tenants Rapidly changing config Chokepoints torque network topology Too many apps to audit! Infrastructure supports small # of internal clients • Software and topology change slowly • Can exploit natural network chokepoints • Feasible to audit app code • Scaling requires more agility & flexibility • Exploits more likely • Exploits can use cloud resources to do more damage • Attack other tenants • External/internal DoS • Need new approach

  3. 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 monitorsPush enforcement from network to end hosts • Distributed across many hosts • Runs in trusted layers

  4. In-network enforcement OS OS OS OS Hypervisor Hypervisor Hypervisor Hypervisor Deep Packet Inspection Appliance Firewall DoS protection Allow to Trusted component

  5. Trusted end host monitors Central Controller OS OS OS Hypervisor Hypervisor Hypervisor Allow to Allow to Allow to Trusted NIC Trusted NIC Trusted NIC Shutoff DoS protection DoS protection DoS protection Trusted Alarm Trusted component

  6. 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)

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