-md-4 col-lg-2 col-form-label">
        <span class="lang-field lang-fa">پروتکل:</span>
        <span class="lang-field lang-en">Protocol:</span>
        <span class="lang-field lang-cn">协议：</span>
      </label>
      <div class="col-sm-12 col-md-8 col-lg-2">
        <select class="form-control" id="protocol">
          <option value="http" selected>HTTP</option>
          <option value="https">HTTPS</option>
        </select>
      </div>
      <label for="port-no" class="col-sm-12 col-md-4 co