code: func getIptablesVersionString() (string, error) {
  	cmd := exec.Command("iptables", "--version")
  	var out bytes.Buffer
  	cmd.Stdout = &out
  	err := cmd.Run()
  	if err != nil {
  		return "", err
  	}
  	return out.String(), nil
  }
docs: // Runs "iptables --version" to get the version string