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no-public-egress-sgr

Explanation

Opening up ports to connect out to the public internet is generally to be avoided. You should restrict access to IP addresses or ranges that are explicitly required where possible.

Possible Impact

Your port is egressing data to the internet

Suggested Resolution

Set a more restrictive cidr range

Insecure Example

The following example will fail the aws-vpc-no-public-egress-sgr check.

resource "aws_security_group_rule" "bad_example" {
    type = "egress"
    cidr_blocks = ["0.0.0.0/0"]
}

Secure Example

The following example will pass the aws-vpc-no-public-egress-sgr check.

resource "aws_security_group_rule" "good_example" {
    type = "egress"
    cidr_blocks = ["10.0.0.0/16"]
}