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VPC Modules 0.28.1Last updated in version 0.22.3

Port Calculator Module

View Source Release Notes

NOTE:

This module is an intermediate module used by network-acl-inbound and network-acl-outbound modules. This is not intended to be used directly.

This Terraform Module includes port computations that make it easier to implement NACL rules that explicitly omit specific ports. This is useful for adhering to various compliance standards that explicitly deny inclusion of NACL rules that allow unrestricted access to certain ports, regardless of the priority of the rule.

For example, if the input specifies to exclude the ports 22 and 3389, the output will be a list of port ranges that exclude just those ports:

[
  [0, 21],
  [23, 3388],
  [3390, 65535],
]

Sample Usage​

main.tf

# ------------------------------------------------------------------------------------------------------
# DEPLOY GRUNTWORK'S PORT-RANGE-CALCULATOR MODULE
# ------------------------------------------------------------------------------------------------------

module "port_range_calculator" {

  source = "git::git@github.com:gruntwork-io/terraform-aws-vpc.git//modules/port-range-calculator?ref=v0.28.1"

  # ----------------------------------------------------------------------------------------------------
  # REQUIRED VARIABLES
  # ----------------------------------------------------------------------------------------------------

  # List of ports to exclude from the range.
  exclude_ports = <list(number)>

  # ----------------------------------------------------------------------------------------------------
  # OPTIONAL VARIABLES
  # ----------------------------------------------------------------------------------------------------

  # The starting range of the port range that is returned.
  from_port = 0

  # The ending range of the port range that is returned.
  to_port = 65535

}


Reference​

Required​

exclude_portslist(number)required

List of ports to exclude from the range.

Optional​

from_portnumberoptional

The starting range of the port range that is returned.

0
to_portnumberoptional

The ending range of the port range that is returned.

65535