xdr-terraform-modules/base/aws_client_vpn/auth.tf

resource "aws_ec2_client_vpn_authorization_rule" "vpn_auth_rule" {
  client_vpn_endpoint_id = aws_ec2_client_vpn_endpoint.vpn.id
  target_network_cidr = "0.0.0.0/0"
  authorize_all_groups = true
}