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O 1. 127.0.0.1 » 127.0.0.1 tcp 18416 > 502 [SYN] Seq=0 Win=32768 Len=0
O 2. 127.0.0.1 » 127.0.0.1 tcp 502 > 18416 [SYN, ACK] Seq=0 Ack=1 Win=32768 Len=0
O 3. 127.0.0.1 » 127.0.0.1 tcp 18416 > 502 [ACK] Seq=1 Ack=1 Win=32768 Len=0
O 4. 127.0.0.1 » 127.0.0.1 modbus/tcp query [ 1 pkt(s)]: trans: 0; unit: 1, func: 22: Mask Write Register.
O 5. 127.0.0.1 » 127.0.0.1 tcp 502 > 18416 [ACK] Seq=1 Ack=15 Win=32768 Len=0

Here are some of things that registered users can do with this pcap:

  • Reorder packets
  • Fragment packets
  • Reassemble TCP streams
  • Rewrite TCP streams (over IPv4 and IPv6)
  • Extract embedded HTTP content
  • Convert any packet into a DoS generator