> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/artifact-registry/troubleshooting-and-resources.md).

# Troubleshooting & Resources

- [Tutorials](https://developer.harness.io/artifact-registry/troubleshooting-and-resources/tutorials.md): Follow Artifact Registry tutorials.
- [Create Docker registries using Terraform](https://developer.harness.io/artifact-registry/troubleshooting-and-resources/tutorials/create-registries-using-terraform.md): Provision a Harness Artifact Registry virtual registry, an upstream proxy to Docker Hub, and link them as infrastructure as code with the Harness Terraform provider.
- [Implement Dependency Firewall with OPA policies](https://developer.harness.io/artifact-registry/troubleshooting-and-resources/tutorials/dependency-firewall-opa-policies.md): Learn how to secure your software supply chain using Dependency Firewall with Open Policy Agent policies and policy sets in Harness Artifact Registry.
- [What's Supported with Artifact Registries](https://developer.harness.io/artifact-registry/troubleshooting-and-resources/whats-supported.md): The registry types, platform integrations, and regional capabilities available in Harness Artifact Registry.
- [Best Practices](https://developer.harness.io/artifact-registry/troubleshooting-and-resources/ar-best-practices.md): Learn how to name and structure artifact registries for clarity, consistency, and simpler governance.
- [Authorization & Authentication](https://developer.harness.io/artifact-registry/troubleshooting-and-resources/authorization-and-authentication.md): Troubleshoot Artifact Registry authentication and authorization errors.
- [Issues Pulling Images](https://developer.harness.io/artifact-registry/troubleshooting-and-resources/authorization-and-authentication/auth-401-errors.md): Fixing 401 Unauthorized errors when pulling images from Harness Artifact Registry.
- [403 Errors in Pipeline Execution](https://developer.harness.io/artifact-registry/troubleshooting-and-resources/authorization-and-authentication/auth-403-errors.md): Troubleshooting common 403 errors during pipeline execution in Harness Artifact Registry.