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A firewall rule allows traffic from/to the public internet

Default Severity: medium

Explanation

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

Possible Impact

Exposure of infrastructure to the public internet

Suggested Resolution

Employ more restrictive firewall rules

Insecure Example

The following example will fail the openstack-compute-no-public-access check. 

 resource "openstack_fw_rule_v1" "rule_1" {
    name             = "my_rule"
    description      = "let anyone in"
    action           = "allow"
    protocol         = "tcp"
    destination_port = "22"
    enabled          = "true"
 }

Secure Example

The following example will pass the openstack-compute-no-public-access check. 

 resource "openstack_fw_rule_v1" "rule_1" {
    name                   = "my_rule"
    description            = "don't let just anyone in"
    action                 = "allow"
    protocol               = "tcp"
    destination_ip_address = "10.10.10.1"
    source_ip_address      = "10.10.10.2"
    destination_port       = "22"
    enabled                = "true"
 }