kucing sederhana pada file pcap terlihat mengerikan:
$cat tcp_dump.pcap
?ò????YVJ?
JJ
?@@.?E<??@@
?CA??qe?U????иh?
.Ceh?YVJ??
JJ
?@@.?E<??@@
CA??qe?U????еz?
.ChV?YVJ$?JJ
?@@.?E<-/@@A?CAͼ?9????F???A&?
.Ck??YVJgeJJ@@.?Ӣ#3E<@3{nͼ?9CA??P?ɝ?F???<K?
?ԛ`.Ck??YVJgeBB
?@@.?E4-0@@AFCAͼ?9????F?P?ʀ???
.Ck??ԛ`?YVJ?""@@.?Ӣ#3E?L@3?Iͼ?9CA??P?ʝ?F?????
?ԛ?.Ck?220-rly-da03.mx
dll.
Saya mencoba membuatnya lebih cantik dengan:
sudo tcpdump -ttttnnr tcp_dump.pcap
reading from file tcp_dump.pcap, link-type EN10MB (Ethernet)
2009-07-09 20:57:40.819734 IP 67.23.28.65.49237 > 216.239.113.101.25: S 2535121895:2535121895(0) win 5840 <mss 1460,sackOK,timestamp 776168808 0,nop,wscale 5>
2009-07-09 20:57:43.819905 IP 67.23.28.65.49237 > 216.239.113.101.25: S 2535121895:2535121895(0) win 5840 <mss 1460,sackOK,timestamp 776169558 0,nop,wscale 5>
2009-07-09 20:57:47.248100 IP 67.23.28.65.42385 > 205.188.159.57.25: S 2644526720:2644526720(0) win 5840 <mss 1460,sackOK,timestamp 776170415 0,nop,wscale 5>
2009-07-09 20:57:47.288103 IP 205.188.159.57.25 > 67.23.28.65.42385: S 1358829769:1358829769(0) ack 2644526721 win 5792 <mss 1460,sackOK,timestamp 4292123488 776170415,nop,wscale 2>
2009-07-09 20:57:47.288103 IP 67.23.28.65.42385 > 205.188.159.57.25: . ack 1 win 183 <nop,nop,timestamp 776170425 4292123488>
2009-07-09 20:57:47.368107 IP 205.188.159.57.25 > 67.23.28.65.42385: P 1:481(480) ack 1 win 1448 <nop,nop,timestamp 4292123568 776170425>
2009-07-09 20:57:47.368107 IP 67.23.28.65.42385 > 205.188.159.57.25: . ack 481 win 216 <nop,nop,timestamp 776170445 4292123568>
2009-07-09 20:57:47.368107 IP 67.23.28.65.42385 > 205.188.159.57.25: P 1:18(17) ack 481 win 216 <nop,nop,timestamp 776170445 4292123568>
2009-07-09 20:57:47.404109 IP 205.188.159.57.25 > 67.23.28.65.42385: . ack 18 win 1448 <nop,nop,timestamp 4292123606 776170445>
2009-07-09 20:57:47.404109 IP 205.188.159.57.25 > 67.23.28.65.42385: P 481:536(55) ack 18 win 1448 <nop,nop,timestamp 4292123606 776170445>
2009-07-09 20:57:47.404109 IP 67.23.28.65.42385 > 205.188.159.57.25: P 18:44(26) ack 536 win 216 <nop,nop,timestamp 776170454 4292123606>
2009-07-09 20:57:47.444112 IP 205.188.159.57.25 > 67.23.28.65.42385: P 536:581(45) ack 44 win 1448 <nop,nop,timestamp 4292123644 776170454>
2009-07-09 20:57:47.484114 IP 67.23.28.65.42385 > 205.188.159.57.25: . ack 581 win 216 <nop,nop,timestamp 776170474 4292123644>
2009-07-09 20:57:47.616121 IP 67.23.28.65.42385 > 205.188.159.57.25: P 44:50(6) ack 581 win 216 <nop,nop,timestamp 776170507 4292123644>
2009-07-09 20:57:47.652123 IP 205.188.159.57.25 > 67.23.28.65.42385: P 581:589(8) ack 50 win 1448 <nop,nop,timestamp 4292123855 776170507>
2009-07-09 20:57:47.652123 IP 67.23.28.65.42385 > 205.188.159.57.25: . ack 589 win 216 <nop,nop,timestamp 776170516 4292123855>
2009-07-09 20:57:47.652123 IP 67.23.28.65.42385 > 205.188.159.57.25: P 50:56(6) ack 589 win 216 <nop,nop,timestamp 776170516 4292123855>
2009-07-09 20:57:47.652123 IP 67.23.28.65.42385 > 205.188.159.57.25: F 56:56(0) ack 589 win 216 <nop,nop,timestamp 776170516 4292123855>
2009-07-09 20:57:47.668124 IP 67.23.28.65.49239 > 216.239.113.101.25: S 2642380481:2642380481(0) win 5840 <mss 1460,sackOK,timestamp 776170520 0,nop,wscale 5>
2009-07-09 20:57:47.692126 IP 205.188.159.57.25 > 67.23.28.65.42385: P 589:618(29) ack 57 win 1448 <nop,nop,timestamp 4292123893 776170516>
2009-07-09 20:57:47.692126 IP 67.23.28.65.42385 > 205.188.159.57.25: R 2644526777:2644526777(0) win 0
2009-07-09 20:57:47.692126 IP 205.188.159.57.25 > 67.23.28.65.42385: F 618:618(0) ack 57 win 1448 <nop,nop,timestamp 4292123893 776170516>
2009-07-09 20:57:47.692126 IP 67.23.28.65.42385 > 205.188.159.57.25: R 2644526777:2644526777(0) win 0
Yah ... itu jauh lebih cantik tetapi tidak menunjukkan pesan yang sebenarnya. Saya sebenarnya dapat mengekstraksi lebih banyak informasi hanya dengan melihat file RAW. Apa cara terbaik (dan paling mudah termudah) untuk hanya melihat semua isi file pcap?
MEMPERBARUI
Berkat tanggapan di bawah ini, saya membuat beberapa kemajuan. Berikut ini tampilannya sekarang:
tcpdump -qns 0 -A -r blah.pcap
20:57:47.368107 IP 205.188.159.57.25 > 67.23.28.65.42385: tcp 480
0x0000: 4500 0214 834c 4000 3306 f649 cdbc 9f39 E....L@.3..I...9
0x0010: 4317 1c41 0019 a591 50fe 18ca 9da0 4681 C..A....P.....F.
0x0020: 8018 05a8 848f 0000 0101 080a ffd4 9bb0 ................
0x0030: 2e43 6bb9 3232 302d 726c 792d 6461 3033 .Ck.220-rly-da03
0x0040: 2e6d 782e 616f 6c2e 636f 6d20 4553 4d54 .mx.aol.com.ESMT
0x0050: 5020 6d61 696c 5f72 656c 6179 5f69 6e2d P.mail_relay_in-
0x0060: 6461 3033 2e34 3b20 5468 752c 2030 3920 da03.4;.Thu,.09.
0x0070: 4a75 6c20 3230 3039 2031 363a 3537 3a34 Jul.2009.16:57:4
0x0080: 3720 2d30 3430 300d 0a32 3230 2d41 6d65 7.-0400..220-Ame
0x0090: 7269 6361 204f 6e6c 696e 6520 2841 4f4c rica.Online.(AOL
0x00a0: 2920 616e 6420 6974 7320 6166 6669 6c69 ).and.its.affili
0x00b0: 6174 6564 2063 6f6d 7061 6e69 6573 2064 ated.companies.d
dll.
Ini terlihat bagus, tetapi masih membuat pesan aktual di sebelah kanan sulit dibaca. Apakah ada cara untuk melihat pesan-pesan itu dengan cara yang lebih ramah?
MEMPERBARUI
Ini membuatnya cantik:
tcpick -C -yP -r tcp_dump.pcap
Terima kasih!