AWS::FMS::Policy NetworkAclEntry - Amazon CloudFormation
SyntaxProperties
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AWS::FMS::Policy NetworkAclEntry

Describes a rule in a network ACL.

Each network ACL has a set of numbered ingress rules and a separate set of numbered egress rules. When determining whether a packet should be allowed in or out of a subnet associated with the network ACL, Amazon processes the entries in the network ACL according to the rule numbers, in ascending order.

When you manage an individual network ACL, you explicitly specify the rule numbers. When you specify the network ACL rules in a Firewall Manager policy, you provide the rules to run first, in the order that you want them to run, and the rules to run last, in the order that you want them to run. Firewall Manager assigns the rule numbers for you when you save the network ACL policy specification.

Syntax

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

JSON

{
  "CidrBlock" : String,
  "Egress" : Boolean,
  "IcmpTypeCode" : IcmpTypeCode,
  "Ipv6CidrBlock" : String,
  "PortRange" : PortRange,
  "Protocol" : String,
  "RuleAction" : String
}

Properties

CidrBlock

The IPv4 network range to allow or deny, in CIDR notation.

Required: No

Type: String

Pattern: ^(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(\/([0-9]|[1-2][0-9]|3[0-2]))$

Update requires: No interruption

Egress

Indicates whether the rule is an egress, or outbound, rule (applied to traffic leaving the subnet). If it's not an egress rule, then it's an ingress, or inbound, rule.

Required: Yes

Type: Boolean

Update requires: No interruption

IcmpTypeCode

ICMP protocol: The ICMP type and code.

Required: No

Type: IcmpTypeCode

Update requires: No interruption

Ipv6CidrBlock

The IPv6 network range to allow or deny, in CIDR notation.

Required: No

Type: String

Pattern: ^(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))(/(1[0-2]|[0-9]))?$

Update requires: No interruption

PortRange

TCP or UDP protocols: The range of ports the rule applies to.

Required: No

Type: PortRange

Update requires: No interruption

Protocol

The protocol number. A value of "-1" means all protocols.

Required: Yes

Type: String

Pattern: ^(tcp|udp|icmp|([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5]))$

Update requires: No interruption

RuleAction

Indicates whether to allow or deny the traffic that matches the rule.

Required: Yes

Type: String

Allowed values: allow | deny

Update requires: No interruption