terraform-google-parked-domain-baseline

Terraform Module Registry

A terraform module to set up DNS records to harden the parked(unused) domain using GCP Cloud DNS.

Domains should be protected for email spoofing even if they are not intended to be actively used. This module configures DNS records to protect such domain based on M3AAWG Protecting Parked Domains Best Common Practices.

Features

This module creates the following DNS records.

• Null MX record(RFC 7505) to indicate the domain does not accept any email.
• SPF record to indicate no IP is authorized to send email on behalf of this domain.
• DMARC record to enforce receiving domains to reject any email forging this domain.
• Optionally adds rua tag in the DMARC record to receive aggregate feedback reports via email.
• Optionally creates Null MX and DMARC records for wildcard subdomains as well as the root domain(enabled by default).

Usage

provider "google" {
}

module "parked_domain" {
  source = "nozaq/parked-domain-baseline/google"

  zone_name           = "example.com."
  ttl                 = 86400
  include_subdomains  = true
}

Requirements

Name	Version
terraform	>= 1.3
google	>= 4.43

Providers

Name	Version
google	>= 4.43

Inputs

Name	Description	Type	Required
zone_name	The DNS zone name to add the records to.	string	yes
aggregate_feedback_email	The email address to which aggregate feedback is to be sent.	string	no
include_subdomains	Configure all subdomains as well as the root domain.	bool	no
ttl	The TTL of the DNS records.	number	no

Outputs

No outputs.

Related modules

• terraform-aws-parked-domain-baseline: The module to accomplish same outcome with AWS Route53 instead of GCP Cloud DNS.
• terraform-cloudflare-parked-domain-baseline: The module to accomplish same outcome with Cloudflare DNS instead of GCP Cloud DNS.