Creating a DNS filter

With Terraform, you can quickly create a cloud infrastructure in Yandex Cloud and manage it using configuration files. These files store the infrastructure description written in HashiCorp Configuration Language (HCL). If you change the configuration files, Terraform automatically detects which part of your configuration is already deployed, and what should be added or removed.

Terraform is distributed under the Business Source License. The Yandex Cloud provider for Terraform is distributed under the MPL-2.0 license.

For more information about the provider resources, see the relevant documentation on the Terraform website or its mirror.

If you do not have Terraform yet, install it and configure the Yandex Cloud provider.

1. In the configuration file, describe the resources you want to create:

   resource "yandex_dns_firewall" "filter1" {
     name        = "filter-1"
     description = "DNS Filter #1"
     folder_id   = "b1g27..........pe3fg"
   
     labels = {
       label1 = "label-1-value"
     }
   
     enabled         = true
     whitelist_fqdns = ["dom1.net.","*.dom5.net.","*.ru."]
     blacklist_fqdns = ["www.dom1.net.","info.dom5.net."]
   
     resource_config = {
       type           = "CLOUD"
       resource_ids   = ["b1g38..........qg4nl"]
       lock_resources = false
     }
   
      deletion_protection = false
   }
   

   Where:

   • name: Filter name. It must be unique within a folder.
   • description: Filter description.
   • folder_id: ID of the folder you want to create the filter in.
   • enabled: Filter status, enabled or disabled. If not specified, the new filter will be disabled.
   • deletion_protection: Enables deletion protection for the new resource.
   • whitelist_fqdns, blacklist_fqdns: List of FQDNs. How to use DNS filters.
   • resource_config: Block of attributes of the resource subject to the filter:
     • type: Resource type. Valid values: CLOUD, FOLDER, NETWORK.
     • resource_ids: List of resource IDs of a given type.
     • lock_resources: Centralized filter management mode.

2. Create the resources:

   1. In the terminal, navigate to the configuration file directory.

   2. Make sure the configuration is correct using this command:

      terraform validate
      

      If the configuration is valid, you will get this message:

      Success! The configuration is valid.
      

   3. Run this command:

      terraform plan
      

      You will see a list of resources and their properties. No changes will be made at this step. Terraform will show any errors in the configuration.

   4. Apply the configuration changes:

      terraform apply
      

   5. Type yes and press Enter to confirm the changes.

   Terraform will create all the required resources. You can check the new resources in the management console or using this CLI command:

   yc dns firewall get <filter-name>