title: OPC DA disconnect and reconnect automatically after 20-30 seconds
body: <p>We are having AIM.OPC Server, which is connected to a firewall and then to a data diode.
  After several hours, AIM.OPC disconnects at Data diode and reconnect automatically after 20-30 seconds.
  This repeating all the time. 6-7 times in a day.</p>
  <p>When we capture NCAP using Wireshark, below message we received.
  192.178.192.1 192.178.168.2 TCP 60 49157 -&gt; 59021 {FIN, ACK} SEW=273 Ack=740 Win=65024 Len=0.</p>
  <p>here 192.178.192.1 is my OPC Client
  192.178.168.2 is my Data diode station.</p>
  <p>Can someone help me to resolve this issue, not to disconnect from AIM.OPC</p>