| | Public deployments | Offline deployments |

| Terraform binary | By default, Coder downloads Terraform binary from [releases.hashicorp.com](https://releases.hashicorp.com) | Terraform binary must be included in `PATH` for the VM or container image. [Supported versions](https://github.com/coder/coder/blob/main/provisioner/terraform/install.go#L23-L24) |

| Terraform registry | Coder templates will attempt to download providers from [registry.terraform.io](https://registry.terraform.io) or [custom source addresses](https://developer.hashicorp.com/terraform/language/providers/requirements#source-addresses) specified in each template | [Custom source addresses](https://developer.hashicorp.com/terraform/language/providers/requirements#source-addresses) can be specified in each Coder template, or a custom registry/mirror can be used. More details below |

| STUN | By default, Coder uses Google's public STUN server for direct workspace connections | STUN can be safely [disabled](../reference/cli/server.md#--derp-server-stun-addresses) users can still connect via [relayed connections](../admin/networking/index.md#-geo-distribution). Alternatively, you can set a [custom DERP server](../reference/cli/server.md#--derp-server-stun-addresses) |