terraform/website/source/docs/providers/aws/r/security_group.html.markdown

layout	page_title	sidebar_current	description
aws	AWS: aws_security_group	docs-aws-resource-security-group	Provides a security group resource.

aws_security_group

Provides a security group resource.

~> NOTE on Security Groups and Security Group Rules: Terraform currently provides both a standalone Security Group Rule resource (a single ingress or egress rule), and a Security Group resource with ingress and egress rules defined in-line. At this time you cannot use a Security Group with in-line rules in conjunction with any Security Group Rule resources. Doing so will cause a conflict of rule settings and will overwrite rules.

Example Usage

Basic usage

resource "aws_security_group" "allow_all" {
  name = "allow_all"
  description = "Allow all inbound traffic"

  ingress {
      from_port = 0
      to_port = 0
      protocol = "-1"
      cidr_blocks = ["0.0.0.0/0"]
  }

  egress {
      from_port = 0
      to_port = 0
      protocol = "-1"
      cidr_blocks = ["0.0.0.0/0"]
  }
}

Basic usage with tags:

resource "aws_security_group" "allow_all" {
  name = "allow_all"
  description = "Allow all inbound traffic"

  ingress {
      from_port = 0
      to_port = 65535
      protocol = "tcp"
      cidr_blocks = ["0.0.0.0/0"]
  }

  tags {
    Name = "allow_all"
  }
}

Argument Reference

The following arguments are supported:

• name - (Optional) The name of the security group. If omitted, Terraform will assign a random, unique name
• description - (Optional) The security group description. Defaults to "Managed by Terraform". Cannot be "".
• ingress - (Optional) Can be specified multiple times for each ingress rule. Each ingress block supports fields documented below.
• egress - (Optional, VPC only) Can be specified multiple times for each egress rule. Each egress block supports fields documented below.
• vpc_id - (Optional) The VPC ID.
• tags - (Optional) A mapping of tags to assign to the resource.

The ingress block supports:

• cidr_blocks - (Optional) List of CIDR blocks. Cannot be used with security_groups.
• from_port - (Required) The start port.
• protocol - (Required) The protocol. If you select a protocol of "-1", you must specify a "from_port" and "to_port" equal to 0.
• security_groups - (Optional) List of security group Group Names if using EC2-Classic or the default VPC, or Group IDs if using a non-default VPC. Cannot be used with cidr_blocks.
• self - (Optional) If true, the security group itself will be added as a source to this ingress rule.
• to_port - (Required) The end range port.

The egress block supports:

• cidr_blocks - (Optional) List of CIDR blocks. Cannot be used with security_groups.
• from_port - (Required) The start port.
• protocol - (Required) The protocol. If you select a protocol of "-1", you must specify a "from_port" and "to_port" equal to 0.
• security_groups - (Optional) List of security group Group Names if using EC2-Classic or the default VPC, or Group IDs if using a non-default VPC. Cannot be used with cidr_blocks.
• self - (Optional) If true, the security group itself will be added as a source to this egress rule.
• to_port - (Required) The end range port.

~> NOTE on Egress rules: By default, AWS creates an ALLOW ALL egress rule when creating a new Security Group inside of a VPC. When creating a new Security Group inside a VPC, Terraform will remove this default rule, and require you specifically re-create it if you desire that rule. We feel this leads to fewer surprises in terms of controlling your egress rules. If you desire this rule to be in place, you can use this egress block:

egress {
  from_port = 0
  to_port = 0
  protocol = "-1"
  cidr_blocks = ["0.0.0.0/0"]
}

Attributes Reference

The following attributes are exported:

• id - The ID of the security group
• vpc_id - The VPC ID.
• owner_id - The owner ID.
• name - The name of the security group
• description - The description of the security group
• ingress - The ingress rules. See above for more.
• egress - The egress rules. See above for more.