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How to Securely Configure a Linux Host to Run Containers

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This guide, as part of the Twistlock Container Security How-To Guides series, describes the concrete steps that you can follow to configure a Linux host to run Docker containers securely.

Key steps highlighted in this guide include:
  • How to start with a minimal installation of the OS and how to selectively add the services needed to run the Linux container applications
  • How to configure the host security settings to harden and protect it from unauthorized access
  • How to configure and install a Docker Engine with sensible default settings to minimize the attack surface
  • How to ensure that the host has the necessary integration with existing enterprise systems like SIEM and enterprise directories
Why we wrote this Twistlock Container Security guide:

Many DevOps and security professionals have asked us questions on how to configure a secure environment to run containers. Questions such as “how to set my server so it can run containers efficiently and securely?” “how do I configure my container images so they are robust and secure?”,  “how do I ensure Kubernetes is working well with my containers?”, are fairly common across many users and companies.

We do this internally – our engineering shop is entirely DevOps and container-driven. Our developers and testers need to set up a Kubernetes cluster for our system, both for production and for testing. We went through the exercise of setting up servers and configure them to run containers in a secure fashion. Similarly, we went through the exercise of developing gold images and enforcing only those to be run on our servers, etc.


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