return nil, fmt.Errorf("iptables version %q is not a valid version string: %v", match[1], err)
	}
	return version, nil
}

// transformToXTablesErrorMessage returns an updated error message with explicit xtables error hints, if applicable.
func transformToXTablesErrorMessage(stderr string, err error) string {
	ee, ok := err.(*exec.ExitError)
	if !ok {
		// Not common, but can happen if file not found error, etc

		stderrStr := stderr.String()

		// Transform to xtables-specific error messages with more useful and actionable hints.
		if err != nil {
			stderrStr = transformToXTablesErrorMessage(stderrStr, err)
		}

		log.Errorf("Command error output: %v", stderrStr)
	}

	return err