opening session from port #8002 to port #4003:
 requesting RLE screenshot (cmd = 00):
  6400:8003->6401:4021 AK=00 SQ=03 HC=00 DC=0000 (1 bytes)
   00
 receiving ack:
  6401:00d3->6400:8003 AK=0a SQ=03 HC=e0 DC=2140 (2 bytes)
   40 21