Support guides
Getting started
These articles provide basic instructions for getting started with Fastly services.
Basics
These articles provide basic information and instructions for configuring Fastly services after getting started.
- Content and its delivery
- Shielding
- Using Fastly's global POP network
- Working with CNAME records and your DNS provider
- Working with domains
- Working with health checks
- Working with hosts
- Working with services
Web interface
These articles describe key features of the Fastly web interface controls.
- About the account menu
- About the Compute page
- About the Deliver page
- About the Domain Inspector stats
- About the Home page
- About the Origin Inspector stats
- About the Resources page
- About the Secure page
- About the stats for Compute services
- About the stats for Deliver services
- About the Stats page
- About the web interface controls
Configuration
These articles provide basic instructions for configuring Fastly services after getting started.
Caching
These articles describe configuration settings and changes you can make to your cache settings when setting up Fastly services.
- Caching configuration best practices
- Controlling caching
- Enabling API caching
- Implementing API cache control
- Overriding caching defaults based on a backend response
- Preventing cache poisoning via HTTP X-headers
- Segmented Caching
Conditions
These articles describe conditions and how to use them in VCL and the Fastly web interface.
Custom VCL
These articles describe how to create your own VCL files with specialized configurations.
- About VCL Snippets
- Basic authentication
- Custom responses that don't hit origin servers
- Guide to VCL
- Isolating header values without regular expressions
- Manipulating the cache key
- Response Cookie handling
- Understanding the different PASS action behaviors
- Uploading custom VCL
- Using dynamic VCL Snippets
- Using regular VCL Snippets
- VCL regular expression cheat sheet
Dictionaries
These articles describe how to move rapid key/value pair decision logic to the edge using dictionaries.
Domains & Origins
These articles describe configuration settings and changes you can make to your domains and origins when setting up Fastly services.
- Changing origins based on user location
- Failover configuration
- IPv6 support
- Maintaining separate HTTP and HTTPS requests to origin servers
- Routing assets to different origins
- Setting up redundant origin servers
- Specifying an override host
- Using Fastly with apex domains
Headers
These articles describe configuration settings and changes you can make to your headers when setting up Fastly services.
- Adding or modifying headers on HTTP requests and responses
- Enabling cross-origin resource sharing (CORS)
- Removing headers from backend response
- Setting Content Type based on file extension
Image optimization
These articles provide basic instructions for and examples of setting up and beginning to use the Fastly Image Optimizer.
Load balancing
These articles provide information about distributing requests across multiple servers to optimize resource use and avoid overloading any single resource.
- About Dynamic Servers
- Automatic load balancing
- Creating and using pools with Dynamic Servers
- Creating and using server entries with Dynamic Servers
Performance
These articles describe how to adjust the performance of Fastly's services beyond standard configuration methods.
- Enabling automatic compression
- Enabling HTTP/3 for Fastly services
- Failure modes with large files
- HTTP/2 server push
- Making query strings agnostic
- Precision Path
- Serving stale content
- Streaming Miss
Purging
These articles describe how to purge cache.
- Authenticating URL purge requests via API
- Purging a URL via the web interface
- Purging all content via the web interface
- Purging with surrogate keys
- Setting Surrogate-Key headers for Amazon S3 origins
- Soft purges
- Wildcard purges
- Working with surrogate keys
Requests
These articles describe configuration settings and changes you can make to requests when working with Fastly services.
- Checking multiple backends for a single request
- Conditionally changing a URL
- How request settings are applied
Responses
These articles describe configuration settings and changes you can make to your response settings when setting up Fastly services.
- Creating and customizing a robots.txt file
- Creating error pages with custom responses
- Responses tutorial
Video
These articles describe setup and configuration guidelines for setting up live stream delivery or video on-demand.
Security
These articles provide information about the administrative, physical, and technical safeguards that protect the Fastly CDN service, 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).
- Manually creating access control lists
- Using the IP block list
- Working with ACLs using the web interface
- About ACLs
Edge Rate Limiting
These articles describe how to work with Fastly's Edge Rate Limiting feature.
Securing communications
These articles describe how to secure communications between Fastly, your origin servers, and your customers.
Security measures
These articles provide information about the administrative, physical, and technical safeguards that protect the Fastly CDN service.
- Data management
- Fastly Next-Gen WAF (powered by Signal Sciences) security measures
- Penetration testing your service behind Fastly
- Security measures
- Security program
TLS
These articles describe how to set up TLS certificates with Fastly services.
- Enabling HSTS through Fastly
- Enabling TLS 1.3 through Fastly
- Forcing a TLS redirect
- Serving HTTPS traffic using certificates you manage
- Serving HTTPS traffic using Fastly-managed certificates
- Setting up free TLS
- TLS termination
Web Application Firewall (2020)
These articles provide information about the Fastly Web Application Firewall (WAF 2020) security product.
- About the Fastly WAF dashboard (2020)
- About the Fastly WAF rule management interface (2020)
- Creating a custom WAF error page (2020)
- Fastly WAF logging (2020)
- Managing rules on the Fastly WAF (2020)
- WAF Rule Exclusions (2020)
- Web Application Firewall (WAF) (2020)
Web Application Firewall (original)
These articles provide information about the original Fastly Web Application Firewall (WAF) security product.
Integrations
These articles describe how Fastly services interoperate with non-Fastly services.
Logging endpoints
These articles describe Fastly's support for protocols that allow you to stream logs to a variety of locations, including third-party services, for storage and analysis.
- Log streaming: Amazon Kinesis Data Streams
- Log streaming: Amazon S3
- Log streaming: Microsoft Azure Blob Storage
- Log streaming: Cloud Files
- Log streaming: Coralogix
- Log streaming: Datadog
- Log streaming: DigitalOcean Spaces
- Log streaming: Elasticsearch
- Log streaming: FTP
- Log streaming: Google BigQuery
- Log streaming: Google Cloud Pub/Sub
- Log streaming: Google Cloud Storage
- Log streaming: Honeycomb
- Log streaming: HTTPS
- Log streaming: Hydrolix
- Log streaming: Kafka
- Log streaming: Log Shuttle
- Log streaming: LogDNA
- Log streaming: Loggly
- Log streaming: Heroku's Logplex
- Log streaming: New Relic Logs
- Log streaming: OpenStack
- Log streaming: Oracle Cloud Storage
- Log streaming: Papertrail
- Log streaming: Scalyr
- Log streaming: SFTP
- Log streaming: Shape Log Analysis
- Log streaming: Splunk
- Log streaming: Storj DCS
- Log streaming: Sumo Logic
- Log streaming: Syslog
- Log streaming: Wasabi Hot Cloud Storage
Non-Fastly services
These articles describe how non-Fastly services interoperate with Fastly.
- Alibaba Object Storage Service
- Amazon S3
- Backblaze B2 Cloud Storage
- Data transfer with Backblaze B2
- DigitalOcean Spaces
- Discounted egress from Google
- Google Cloud Storage
- Google Compute Engine
- Microsoft Azure Blob Storage
- Oracle Cloud Storage
- Outbound data transfer from Azure
- PerimeterX Bot Defender
- Storj DCS Object Storage
- Wasabi Hot Cloud Storage
Diagnostics
These articles describe how to log data, troubleshoot problems, and tune performance.
Common errors
These articles describe common errors you may encounter when setting up and configuring Fastly services.
- Common 400 errors on Fastly
- Common 503 errors on Fastly
- Common OTFP errors
- Common service and domain errors
- Error 1000 with CloudFlare DNS
- Fixing cross-domain errors
- Loop detection
- TLS certificate errors
- TLS origin configuration messages
Debugging techniques
Because Fastly doesn't store customer logs, we provide information about debugging techniques that help you gain insights into your service configurations.
- Changing connection timeouts to your origin
- Checking cache
- Debugging with mtr
- Debugging with WebPageTest
- Fastly's service status
- Google Pagespeed module errors
- Googlebot crawl stats
- Temporarily disabling caching
- Using GET instead of HEAD for command line caching tests
Streaming logs
These articles describe how we support real-time log streaming of data that passes through Fastly.
- About Fastly's real-time log streaming features
- Changing log compression formats
- Changing log line formats
- Changing log placement
- Changing where log files are written
- Configuring Google IAM service account impersonation to avoid storing keys on Fastly logging
- Creating an AWS IAM role for Fastly logging
- Custom log formats
- Encrypting logs
- Setting up remote log streaming
- Useful conditions for logging
- Useful log formats
- Useful variables to log
Account info
These articles describe how to manage account access, billing, and security.
Account management
These articles describe how to manage account access.
- Account lockouts
- Changing company profile details
- Enabling an IP allowlist for account logins through the web interface
- Enabling and disabling two-factor authentication
- Finding and managing your account info
- Monitoring account activity with the audit log
- Reviewing service activity with the event log
- Using API tokens
Billing
These articles describe Fastly's billing and payment plans and how to make adjustments to your billing information.
User access and control
These articles describe how to manage users with permission to access to your account.
Compute@Edge
These articles describe how to configure Compute@Edge services.
Compute@Edge logging endpoints
These articles describe Fastly's support for protocols that allow you to stream logs to a variety of locations, including third-party services, for storage and analysis.
- Compute@Edge log streaming: Amazon Kinesis Data Streams
- Compute@Edge log streaming: Amazon S3
- Compute@Edge log streaming: Microsoft Azure Blob Storage
- Compute@Edge log streaming: Cloud Files
- Compute@Edge log streaming: Coralogix
- Compute@Edge log streaming: Datadog
- Compute@Edge log streaming: DigitalOcean Spaces
- Compute@Edge log streaming: Elasticsearch
- Compute@Edge log streaming: FTP
- Compute@Edge log streaming: Google BigQuery
- Compute@Edge log streaming: Google Cloud Pub/Sub
- Compute@Edge log streaming: Google Cloud Storage
- Compute@Edge log streaming: Honeycomb
- Compute@Edge log streaming: HTTPS
- Compute@Edge log streaming: Kafka
- Compute@Edge log streaming: Log Shuttle
- Compute@Edge log streaming: LogDNA
- Compute@Edge log streaming: Loggly
- Compute@Edge log streaming: Heroku's Logplex
- Compute@Edge log streaming: New Relic Logs
- Compute@Edge log streaming: OpenStack
- Compute@Edge log streaming: Papertrail
- Compute@Edge log streaming: Scalyr
- Compute@Edge log streaming: SFTP
- Compute@Edge log streaming: Splunk
- Compute@Edge log streaming: Sumo Logic
- Compute@Edge log streaming: Syslog
- Setting up remote log streaming for Compute@Edge
Edge Data Storage
These articles describe how to work with the edge data storage features available with Compute@Edge.
Reference
These articles provide reference information about common Fastly terms and configuration settings.
Products
Network Services
These articles provide information about Fastly products that focus on performance (speed), availability, and media and that accelerate content delivery with control from an edge cloud platform.
- Application Programming Interface (API)
- Capacity Reservation
- Cloud Optimizer
- Dedicated IP addresses
- Fanout
- Fastly’s Full-Site Delivery
- Fastly's On-the-Fly Packaging service
- Fastly’s Streaming Delivery
- Image Optimizer
- Media Shield for Live
- Media Shield for VOD
- Nearline Cache
- Origin Connect
- Subscriber Provided Prefix
- Varnish Configuration Language (VCL)
- WebSockets
Security
These articles provide information about Fastly products that deliver web application and API protection.
Observability
These articles provide information about Fastly products that provide visibility and insights into traffic, security, and performance.
Compute
These articles provide information about Fastly's serverless compute environment for building applications and executing at the edge.
Support
These articles provide information about Fastly services and support solutions.
- Assurance Services
- Designated Technical Specialist
- Enterprise Security Support
- Fastly Managed Security Service
- Fastly Next-Gen WAF (powered by Signal Sciences) professional services
- Fastly Next-Gen WAF (powered by Signal Sciences) support description and SLA
- Live Event Monitoring Service
- Performance Optimization Package
- Professional Services
- Related offerings
- Response Security Service
- Security Technical Account Manager
- Service availability SLA
- Support description and SLA
Resources
These articles provide information about Fastly's product lifecycle and the products within it.
Legacy offerings
These articles provide information about Fastly's legacy offerings.
Third-party information
These articles provide information about third-party technology and services incorporated into the Fastly CDN service.
Compliance
These articles provide information about the administrative, physical, and technical safeguards that protect the Fastly CDN service.
Fundamentals
Essentials
Essentials is a collection of guides that introduce you to core concepts essential to understanding content delivery networks (CDNs) and Fastly.
Introduction to Fastly's CDN
This is a step-by-step tutorial that shows you how to use Fastly with an example website and domain name. It guides you through the steps of caching and delivering a static website using the Jekyll static site generator, Amazon AWS, and the Fastly CDN.
Introduction to Fastly Image Optimizer
This is a step-by-step tutorial that shows you how to set up Fastly's Image Optimizer ("Fastly IO") for a real website. It builds on the concepts introduced in Introduction to Fastly's CDN, and it guides you through the steps of optimizing the images for Taco Labs, the static website we previously used as an example.