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Agent Installation Overview

access_time Updated Dec 6, 2022

IMPORTANT: Beginning January 31, 2023, the agent end-of-support policy will take effect. Per this policy, we will support agent versions that are under two years old. On a quarterly cadence, we will deprecate and no longer support agent versions that are older than two years. At the end of January, we will support Agent v4.16.0 and above. If you need help upgrading your agent to a supported version, contact

About Agents

The Signal Sciences Agent is a small daemon process which provides the interface between your web server and our analysis platform. An inbound web request is passed to the agent, which then decides whether the request should be permitted to continue, or whether it should take action.

Choose your OS

To start installing an agent, choose your OS:

Note: ARM processors are currently only supported on agent v4.27.0 and higher. Dedicated agent packages are only available for Ubuntu, Debian, and CentOS.

Agent end-of-support policy

Beginning January 31, 2023, agent versions will enter a two year support cycle with versions older than two years being retired or deprecated on a quarterly cadence. Retiring older versions with fewer features will enable us to focus our resources on supporting and developing newer versions that provide more value to our customers.

Under the agent end-of-support policy, we will:

  • Support agent versions that are under two years old. Customers who use older versions of the agent will be unsupported and will not have access to new features and integrations included with newer versions.

  • Deprecate and remove support from agent versions that are older than two years. Unsupported agent versions will stop receiving rule updates and blocking decisions entirely. Deprecation will occur on a quarterly cadence at the end of January, April, July, and October.

    If you are using an older version that will be deprecated in January, you can upgrade your agent to a supported version. Contact if you need help upgrading your agent.

The agent end-of-support policy adheres to the Fastly product lifecycle.