code: public HostPortList setStripedPassive()
          throws IOException,
                 ServerException {
          Command cmd = new Command("SPAS",
                                    (controlChannel.isIPv6()) ? "2" : null);
          Reply reply = null;
  
          try {
              reply = controlChannel.execute(cmd);
          } catch (UnexpectedReplyCodeException urce) {
              throw ServerException.embedUnexpectedReplyCodeException(urce);
          } catch(FTPReplyParseException rpe) {
              throw ServerException.embedFTPReplyParseException(rpe);
          }
  
          this.gSession.serverMode = GridFTPSession.SERVER_EPAS;
          if (controlChannel.isIPv6()) {
              gSession.serverAddressList =
                  HostPortList.parseIPv6Format(reply.getMessage());
              int size = gSession.serverAddressList.size();
              for (int i=0;i<size;i++) {
                  HostPort6 hp = (HostPort6)gSession.serverAddressList.get(i);
                  if (hp.getHost() == null) {
                      hp.setVersion(HostPort6.IPv6);
                      hp.setHost(controlChannel.getHost());
                  }
              }
          } else {
              gSession.serverAddressList =
                  HostPortList.parseIPv4Format(reply.getMessage());
          }
          return gSession.serverAddressList;
      }
docs: Sets remote server to striped passive server mode (SPAS).