title: Checksum 0xDEAD in TCP ACK
body: <p>I am seeing in the network traces, that my client is sending the following ACK frame to the DC:<br>
  <code><br>
  Frame: Number = 87641, Captured Frame Length = 54, MediaType = ETHERNET<br>
  + Ethernet: Etype = Internet IP (IPv4),DestinationAddress:[AA-AA-AA-AA-AA-AA],SourceAddress:[AA-AA-AA-AA-AA-AA]<br>
  + Ipv4: Src = XXX.XXX.XXX.XXX(CLIENT), Dest = YYY.YYY.YYY.YYY, Next Protocol = TCP, Packet ID = 26829, Total IP Length = 40
  <br>- Tcp:  [Bad CheckSum]Flags=...A...., SrcPort=14229, DstPort=LDAP(389), PayloadLen=0, Seq=4175359382, Ack=1985975784, Win=1357
  <br>-   SrcPort: 14229
  <br>-   DstPort: LDAP(389)
  <br>-   SequenceNumber: 4175359382 (0xF8DEED96)
  <br>-    AcknowledgementNumber: 1985975784 (0x765F95E8)
  <br>  + DataOffset: 80 (0x50)
  <br>  + Flags: ...A....
  <br>-    Window: 1357
  <br>-    Checksum: 0xDEAD, Bad
  <br>-    UrgentPointer: 0 (0x0)
  </code>
  <p>
  Is the Checksum 0xDEAD an indication of something?</p>