Security

These articles provide information about the administrative, physical, and technical safeguards that protect Fastly's product and services, as well as describe how to secure communications between Fastly and your origin servers and customers.


Access Control Lists

These articles describe how to restrict access to resources by allowing or blocking IP addresses with access control lists (ACLs).

Malicious actors can present themselves in a variety of ways on the internet. Automated tools can scrape information from your website, bots…

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Varnish allows you to use access control lists (ACLs) , a feature that enables fast matching of a client's IP address against a list of…

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You can prevent specific IP addresses from accessing your service by adding them to a block list. Enabling this feature creates a condition…

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Access control lists (ACLs) allow you to store a list of permissions that Varnish will use to grant or restrict access to URLs within a…

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Rate Limiting

These articles describe how to work with Fastly's rate limiting features.

Rate limiting is a way to control the rate at which traffic flows through Fastly's network to your origins. You might need rate limiting if…

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You can use the Fastly Rate Limiting feature to create rate limiting policies. When you create a rate limiting policy, you define the…

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Securing communications

These articles describe how to secure communications between Fastly, your origin servers, and your customers.

Apple uses App Transport Security (ATS) to improve the security of connections between web services and applications installed on…

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Security measures

These articles provide information about the administrative, physical, and technical safeguards that protect Fastly's product and services.

Fastly maintains a “privacy and protection by design” approach that is manifested in Fastly’s data governance program. Fastly is intentional…

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Fastly's security measures for the Fastly Next-Gen WAF (powered by Signal Sciences) (Next-Gen WAF) include safeguards that help protect…

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We understand the need for our customers to validate the security of their service behind Fastly. To perform security testing of your Fastly…

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Fastly operates a comprehensive information security program that includes administrative, physical, and technical safeguards to protect its…

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TLS

These articles describe how to set up TLS certificates with Fastly services.

The TLS dashboard provides a high-level overview of the status of your Fastly-managed and self-managed TLS certificates. It alerts you…

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The HTTP Strict Transport Security (HSTS) security enhancement specification provides a way to force modern browsers to communicate only…

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This guide describes how to use Fastly TLS to enable TLS 1.3 for a domain using a TLS certificate you provide or one that Fastly provides…

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If you want to only allow TLS on your site, we have you covered. We've built a setting into the request settings that will allow you to…

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Mutual TLS (mTLS) is an additional layer of network connection security that is added on top of our existing TLS product . By default, the…

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This guide describes how to use Fastly TLS to enable HTTPS for a domain using a certificate managed by Fastly. To serve secure traffic…

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This guide describes how to use the Fastly TLS product to upload and deploy your own TLS certificates and private keys using the Fastly…

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"Your connection is not private" If you've recently started testing Fastly services, you may see errors like the following: These errors…

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When you are connecting to origins over TLS , you may have errors. Hostname mismatches Error: Hostname mismatch Why the error appears Your…

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Welcome! This guide helps new TLS users like you get started with Fastly TLS as quickly as possible using Certainly, Fastly's publicly…

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Before getting started with Fastly-managed TLS subscriptions (managed TLS) or self-managed TLS certificates (Bring Your Own Certificates…

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Identifying TLS terminated requests To maintain optimal caching performance, Fastly uses a TLS terminator separate from the caching…

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