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  1. No. Time Source Destination Protocol Length Info
  2. 1 0.000000 b.b.b.b s.s.s.s TCP 66 59468 → 80 [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1
  3. 2 0.022883 s.s.s.s b.b.b.b TCP 66 80 → 59468 [SYN, ACK] Seq=0 Ack=1 Win=29200 Len=0 MSS=1380 SACK_PERM=1 WS=128
  4. 3 0.022949 b.b.b.b s.s.s.s TCP 54 59468 → 80 [ACK] Seq=1 Ack=1 Win=66048 Len=0
  5. 4 0.025405 b.b.b.b s.s.s.s HTTP 294 GET / HTTP/1.0
  6. 5 0.026677 s.s.s.s b.b.b.b HTTP 666 HTTP/1.1 403 Forbidden (text/html)
  7. 6 0.026678 s.s.s.s b.b.b.b TCP 54 80 → 59468 [FIN, ACK] Seq=613 Ack=241 Win=0 Len=0
  8. 7 0.026678 s.s.s.s b.b.b.b TCP 54 80 → 59468 [RST, ACK] Seq=614 Ack=241 Win=0 Len=0
  9.  
  10. $ sudo tcpdump -n port 80 or port 443
  11. tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
  12. listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
  13. 16:53:26.625013 IP b.b.b.b.59468 > s.s.s.s.80: Flags [S], seq 2382139585, win 8192, options [mss 1380,nop,wscale 8,nop,nop,sackOK], length 0
  14. 16:53:26.625131 IP s.s.s.s.80 > b.b.b.b.59468: Flags [S.], seq 1966829679, ack 2382139586, win 29200, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
  15. 16:53:26.647631 IP b.b.b.b.59468 > s.s.s.s.80: Flags [.], ack 1, win 258, length 0
  16. 16:53:26.650205 IP b.b.b.b.59468 > s.s.s.s.80: Flags [R.], seq 1, ack 1, win 258, length 0
  17.  
  18. ----------------------------------------
  19. Exception happened during processing of request from ('b.b.b.b', 59468)
  20. Traceback (most recent call last):
  21. File "/usr/lib/python2.7/SocketServer.py", line 295, in _handle_request_noblock
  22. self.process_request(request, client_address)
  23. File "/usr/lib/python2.7/SocketServer.py", line 321, in process_request
  24. self.finish_request(request, client_address)
  25. File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request
  26. self.RequestHandlerClass(request, client_address, self)
  27. File "/usr/lib/python2.7/SocketServer.py", line 655, in __init__
  28. self.handle()
  29. File "/usr/lib/python2.7/BaseHTTPServer.py", line 340, in handle
  30. self.handle_one_request()
  31. File "/usr/lib/python2.7/BaseHTTPServer.py", line 310, in handle_one_request
  32. self.raw_requestline = self.rfile.readline(65537)
  33. File "/usr/lib/python2.7/socket.py", line 476, in readline
  34. data = self._sock.recv(self._rbufsize)
  35. error: [Errno 104] Connection reset by peer
  36. ----------------------------------------
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