cfg.DryRun = dependencies.DryRunFilePath.Get() != ""
	cfg.RedirectDNS = rdrct.dnsRedirect
	cfg.CaptureAllDNS = rdrct.dnsRedirect
	cfg.DropInvalid = rdrct.invalidDrop
	cfg.DualStack = rdrct.dualStack

	netNs, err := getNs(netns)
	if err != nil {
		err = fmt.Errorf("failed to open netns %q: %s", netns, err)
		return err
	}
	defer netNs.Close()

	return netNs.Do(func(_ ns.NetNS) error {

	if len(mockIntercept.lastRedirect) == 0 {
		t.Fatal("expected nsenterFunc to be called")
	}
	r := mockIntercept.lastRedirect[len(mockIntercept.lastRedirect)-1]
	if !r.dualStack {
		t.Fatalf("expect dualStack is true, actual %v", r.dualStack)
	}
}

func Test_dedupPorts(t *testing.T) {
	type args struct {
		ports []string
	}
	tests := []struct {
		name string
		args args
		want []string