AWS::Route53Resolver::FirewallRuleGroup FirewallRule - AWS CloudFormation
SyntaxProperties

This is the new AWS CloudFormation Template Reference Guide. Please update your bookmarks and links. For help getting started with CloudFormation, see the AWS CloudFormation User Guide.

AWS::Route53Resolver::FirewallRuleGroup FirewallRule

A single firewall rule in a rule group.

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

JSON

{
  "Action" : String,
  "BlockOverrideDnsType" : String,
  "BlockOverrideDomain" : String,
  "BlockOverrideTtl" : Integer,
  "BlockResponse" : String,
  "ConfidenceThreshold" : String,
  "DnsThreatProtection" : String,
  "FirewallDomainListId" : String,
  "FirewallDomainRedirectionAction" : String,
  "FirewallThreatProtectionId" : String,
  "Priority" : Integer,
  "Qtype" : String
}

Properties

Action

The action that DNS Firewall should take on a DNS query when it matches one of the domains in the rule's domain list, or a threat in a DNS Firewall Advvanced rule:

  • ALLOW - Permit the request to go through. Not available for DNS Firewall Advanced rules.

  • ALERT - Permit the request to go through but send an alert to the logs.

  • BLOCK - Disallow the request. If this is specified,then BlockResponse must also be specified.

    if BlockResponse is OVERRIDE, then all of the following OVERRIDE attributes must be specified:

    • BlockOverrideDnsType

    • BlockOverrideDomain

    • BlockOverrideTtl

Required: Yes

Type: String

Allowed values: ALLOW | BLOCK | ALERT

Update requires: No interruption

BlockOverrideDnsType

The DNS record's type. This determines the format of the record value that you provided in BlockOverrideDomain. Used for the rule action BLOCK with a BlockResponse setting of OVERRIDE.

Required: No

Type: String

Allowed values: CNAME

Update requires: No interruption

BlockOverrideDomain

The custom DNS record to send back in response to the query. Used for the rule action BLOCK with a BlockResponse setting of OVERRIDE.

Required: No

Type: String

Minimum: 1

Maximum: 255

Update requires: No interruption

BlockOverrideTtl

The recommended amount of time, in seconds, for the DNS resolver or web browser to cache the provided override record. Used for the rule action BLOCK with a BlockResponse setting of OVERRIDE.

Required: No

Type: Integer

Minimum: 0

Maximum: 604800

Update requires: No interruption

BlockResponse

The way that you want DNS Firewall to block the request. Used for the rule action setting BLOCK.

  • NODATA - Respond indicating that the query was successful, but no response is available for it.

  • NXDOMAIN - Respond indicating that the domain name that's in the query doesn't exist.

  • OVERRIDE - Provide a custom override in the response. This option requires custom handling details in the rule's BlockOverride* settings.

Required: No

Type: String

Allowed values: NODATA | NXDOMAIN | OVERRIDE

Update requires: No interruption

ConfidenceThreshold

The confidence threshold for DNS Firewall Advanced. You must provide this value when you create a DNS Firewall Advanced rule. The confidence level values mean:

  • LOW: Provides the highest detection rate for threats, but also increases false positives.

  • MEDIUM: Provides a balance between detecting threats and false positives.

  • HIGH: Detects only the most well corroborated threats with a low rate of false positives.

Required: No

Type: String

Allowed values: LOW | MEDIUM | HIGH

Update requires: No interruption

DnsThreatProtection

The type of the DNS Firewall Advanced rule. Valid values are:

  • DGA: Domain generation algorithms detection. DGAs are used by attackers to generate a large number of domains to to launch malware attacks.

  • DNS_TUNNELING: DNS tunneling detection. DNS tunneling is used by attackers to exfiltrate data from the client by using the DNS tunnel without making a network connection to the client.

Required: No

Type: String

Allowed values: DGA | DNS_TUNNELING

Update requires: No interruption

FirewallDomainListId

The ID of the domain list that's used in the rule.

Required: No

Type: String

Minimum: 1

Maximum: 64

Update requires: No interruption

FirewallDomainRedirectionAction

How you want the the rule to evaluate DNS redirection in the DNS redirection chain, such as CNAME, or DNAME.

Inspect_Redirection_Domain (Default) inspects all domains in the redirection chain. The individual domains in the redirection chain must be added to the domain list.

Trust_Redirection_Domain inspects only the first domain in the redirection chain. You don't need to add the subsequent domains in the domain in the redirection list to the domain list.

Required: No

Type: String

Allowed values: INSPECT_REDIRECTION_DOMAIN | TRUST_REDIRECTION_DOMAIN

Update requires: No interruption

FirewallThreatProtectionId

ID of the DNS Firewall Advanced rule.

Required: No

Type: String

Minimum: 1

Maximum: 64

Update requires: No interruption

Priority

The priority of the rule in the rule group. This value must be unique within the rule group. DNS Firewall processes the rules in a rule group by order of priority, starting from the lowest setting.

Required: Yes

Type: Integer

Update requires: No interruption

Qtype

The DNS query type you want the rule to evaluate. Allowed values are;

  • A: Returns an IPv4 address.

  • AAAA: Returns an Ipv6 address.

  • CAA: Restricts CAs that can create SSL/TLS certifications for the domain.

  • CNAME: Returns another domain name.

  • DS: Record that identifies the DNSSEC signing key of a delegated zone.

  • MX: Specifies mail servers.

  • NAPTR: Regular-expression-based rewriting of domain names.

  • NS: Authoritative name servers.

  • PTR: Maps an IP address to a domain name.

  • SOA: Start of authority record for the zone.

  • SPF: Lists the servers authorized to send emails from a domain.

  • SRV: Application specific values that identify servers.

  • TXT: Verifies email senders and application-specific values.

  • A query type you define by using the DNS type ID, for example 28 for AAAA. The values must be defined as TYPENUMBER, where the NUMBER can be 1-65334, for example, TYPE28. For more information, see List of DNS record types.

Required: No

Type: String

Minimum: 1

Maximum: 16

Update requires: No interruption