0
我在服务器上运行tcpdump以捕获我的服务器（ServerA）和远程服务器（ServerB）之间的流量。我不知道如何正确读取tcpdump的输出。有人能指出ServerB是否确认从ServerA发送的数据包实际上是由ServerB接收的？这里是tcpdump的日志：tcpdump - 如何检查服务器是否收到数据包（已确认）
2015-03-31 11:32:18.038284 IP (tos 0x0, ttl 64, id 30781, offset 0, flags [DF], proto TCP (6), length 60)
ServerA.14033 > ServerB.8004: Flags [S], cksum 0x02bd (correct), seq 337482636, win 14600, options [mss 1460,nop,nop,TS val 506588081 ecr 0,nop,wscale 7], length 0
0x0000: 4500 003c 783d 4000 4006 bae4 0a04 7a0e E.. ServerA.14033: Flags [S.], cksum 0x3b2a (correct), seq 1742982091, ack 337482637, win 4140, options [mss 1380,nop,wscale 0], length 0
0x0000: 4500 0030 5ff2 0000 f606 5d3b cefd b48a E..0_.....];....
0x0010: 0a04 7a0e 1f44 36d1 67e3 cbcb 141d 938d ..z..D6.g.......
0x0020: 7012 102c 3b2a 0000 0204 0564 0103 0300 p..,;*.....d....
2015-03-31 11:32:18.078622 IP (tos 0x0, ttl 64, id 30782, offset 0, flags [DF], proto TCP (6), length 40)
ServerA.14033 > ServerB.8004: Flags [.], cksum 0x7657 (correct), seq 337482637, ack 1742982092, win 115, length 0
0x0000: 4500 0028 783e 4000 4006 baf7 0a04 7a0e E..(x>@[email protected]
0x0010: cefd b48a 36d1 1f44 141d 938d 67e3 cbcc ....6..D....g...
0x0020: 5010 0073 7657 0000 P..svW..
2015-03-31 11:32:18.093197 IP (tos 0x0, ttl 64, id 30783, offset 0, flags [DF], proto TCP (6), length 208)
ServerA.14033 > ServerB.8004: Flags [P.], cksum 0x085d (incorrect -> 0x43ad), seq 337482637:337482805, ack 1742982092, win 115, length 168
0x0000: 4500 00d0 783f 4000 4006 ba4e 0a04 7a0e [email protected]@..N..z.
0x0010: cefd b48a 36d1 1f44 141d 938d 67e3 cbcc ....6..D....g...
0x0020: 5018 0073 085d 0000 1603 0100 a301 0000 P..s.]..........
0x0030: 9f03 0155 1abe 0244 8cef bc2f fbaf 01ba ...U...D.../....
0x0040: d77a de09 8698 1584 9755 7a91 e895 0636 .z.......Uz....6
0x0050: 5d53 bd00 0038 c00a c014 0035 c005 c00f ]S...8.....5....
0x0060: 0039 0038 c009 c013 002f c004 c00e 0033 .9.8...../.....3
0x0070: 0032 c007 c011 0005 c002 c00c c008 c012 .2..............
0x0080: 000a c003 c00d 0016 0013 0004 00ff 0100 ................
0x0090: 003e 000a 0034 0032 0017 0001 0003 0013 .>...4.2........
0x00a0: 0015 0006 0007 0009 000a 0018 000b 000c ................
0x00b0: 0019 000d 000e 000f 0010 0011 0002 0012 ................
0x00c0: 0004 0005 0014 0008 0016 000b 0002 0100 ................
....
...Cert Exchange
....
2015-03-31 11:32:18.152983 IP (tos 0x0, ttl 247, id 24608, offset 0, flags [none], proto TCP (6), length 225)
ServerB.8004 > ServerA.14033: Flags [P.], cksum 0x71b6 (correct), seq 1742986232:1742986417, ack 337482805, win 4308, length 185
0x0000: 4500 00e1 6020 0000 f706 5b5c cefd b48a E...`.....[\....
0x0010: 0a04 7a0e 1f44 36d1 67e3 dbf8 141d 9435 ..z..D6.g......5
0x0020: 5018 10d4 71b6 0000 0105 0507 0303 0609 P...q...........
0x0030: 6086 4801 86f8 4204 0106 0a60 8648 0186 `.H...B....`.H..
0x0040: f845 0108 0130 0d06 092a 8648 86f7 0d01 .E...0...*.H....
0x0050: 0105 0500 0381 8100 1302 ddf8 e886 00f2 ................
0x0060: 5af8 f820 0c59 8862 07ce cef7 4ef9 bb59 Z....Y.b....N..Y
0x0070: a198 e5e1 38dd 4ebc 6618 d3ad eb18 f20d ....8.N.f.......
0x0080: c96d 3e4a 9420 c33c babd 6554 c6af 44b3 .m>J.........c..^.
0x00a0: e52a 67ce cd33 0c2a d789 5603 231f b3be .*g..3.*..V.#...
0x00b0: e83a 0859 b4ec 4535 f78a 5bff 66cf 50af .:.Y..E5..[.f.P.
0x00c0: c66d 578d 1978 b7b9 a2d1 57ea 1f9a 4baf .mW..x....W...K.
0x00d0: bac9 8e12 7ec6 bdff 1603 0100 040e 0000 ....~...........
0x00e0: 00 .
2015-03-31 11:32:18.152999 IP (tos 0x0, ttl 64, id 30787, offset 0, flags [DF], proto TCP (6), length 40)
ServerA.14033 > ServerB.8004: Flags [.], cksum 0x6470 (correct), seq 337482805, ack 1742986417, win 205, length 0
0x0000: 4500 0028 7843 4000 4006 baf2 0a04 7a0e E..([email protected]@.....z.
0x0010: cefd b48a 36d1 1f44 141d 9435 67e3 dcb1 ....6..D...5g...
0x0020: 5010 00cd 6470 0000 P...dp..
2015-03-31 11:32:18.166971 IP (tos 0x0, ttl 64, id 30788, offset 0, flags [DF], proto TCP (6), length 307)
ServerA.14033 > ServerB.8004: Flags [P.], cksum 0x08c0 (incorrect -> 0xf8ac), seq 337482805:337483072, ack 1742986417, win 205, length 267
0x0000: 4500 0133 7844 4000 4006 b9e6 0a04 7a0e [email protected]@.....z.
0x0010: cefd b48a 36d1 1f44 141d 9435 67e3 dcb1 ....6..D...5g...
0x0020: 5018 00cd 08c0 0000 1603 0101 0610 0001 P...............
0x0030: 0201 0086 f933 32c1 9576 1c51 5f32 c8b2 .....32..v.Q_2..
0x0040: 7b59 5d79 3fd1 45c4 43c7 2231 1336 ff4b {Y]y?.E.C."1.6.K
0x0050: 3cb9 2851 88dd 377a 3bfc b7cf 7e8c 0c2c w..nK_...T.
0x00c0: f7b0 587c 73ca 1cd5 f292 304b 8eb1 2151 ..X|s.....0K..!Q
0x00d0: ac45 ad62 4328 9ed0 dd74 6767 d5ea 986e .E.bC(...tgg...n
0x00e0: d14c def4 bcd2 ff1f a9e3 c047 acfe 0aee .L.........G....
0x00f0: 2652 4e89 cf1c f700 6da5 1827 213a 4b1b &RN.....m..'!:K.
0x0100: d447 a3fd 35d1 8282 743a 17a2 b27f c66a .G..5...t:.....j
0x0110: 7fd1 db43 facb 6d89 614c 4f0d 7fb6 d985 ...C..m.aLO.....
0x0120: 6ee1 b1c7 50ad 0dfe b218 dc21 9973 8894 n...P......!.s..
0x0130: c0f0 42 ..B
2015-03-31 11:32:18.167830 IP (tos 0x0, ttl 64, id 30789, offset 0, flags [DF], proto TCP (6), length 46)
ServerA.14033 > ServerB.8004: Flags [P.], cksum 0x07bb (incorrect -> 0x4d53), seq 337483072:337483078, ack 1742986417, win 205, length 6
0x0000: 4500 002e 7845 4000 4006 baea 0a04 7a0e [email protected]@.....z.
0x0010: cefd b48a 36d1 1f44 141d 9540 67e3 dcb1 [email protected]
0x0020: 5018 00cd 07bb 0000 1403 0100 0101 P.............
2015-03-31 11:32:18.168755 IP (tos 0x0, ttl 64, id 30790, offset 0, flags [DF], proto TCP (6), length 81)
ServerA.14033 > ServerB.8004: Flags [P.], cksum 0x07de (incorrect -> 0xf231), seq 337483078:337483119, ack 1742986417, win 205, length 41
0x0000: 4500 0051 7846 4000 4006 bac6 0a04 7a0e [email protected]@.....z.
0x0010: cefd b48a 36d1 1f44 141d 9546 67e3 dcb1 ....6..D...Fg...
0x0020: 5018 00cd 07de 0000 1603 0100 24c4 5c80 P...........$.\.
0x0030: 8efa bc61 ecd8 bc27 0578 b2b9 36c2 4bad ...a...'.x..6.K.
0x0040: 9419 9bab 4c62 2259 84bf 1b60 f8e8 772c ....Lb"Y...`..w,
0x0050: fb .
2015-03-31 11:32:18.196123 IP (tos 0x0, ttl 247, id 24624, offset 0, flags [none], proto TCP (6), length 40)
ServerB.8004 > ServerA.14033: Flags [.], cksum 0x5247 (correct), seq 1742986417, ack 337483078, win 4581, length 0
0x0000: 4500 0028 6030 0000 f706 5c05 cefd b48a E..(`0....\.....
0x0010: 0a04 7a0e 1f44 36d1 67e3 dcb1 141d 9546 ..z..D6.g......F
0x0020: 5010 11e5 5247 0000 0000 0000 0000 P...RG........
2015-03-31 11:32:18.197205 IP (tos 0x0, ttl 247, id 24628, offset 0, flags [none], proto TCP (6), length 87)
ServerB.8004 > ServerA.14033: Flags [P.], cksum 0xc1b9 (correct), seq 1742986417:1742986464, ack 337483119, win 4622, length 47
0x0000: 4500 0057 6034 0000 f706 5bd2 cefd b48a E..W`4....[.....
0x0010: 0a04 7a0e 1f44 36d1 67e3 dcb1 141d 956f ..z..D6.g......o
0x0020: 5018 120e c1b9 0000 1403 0100 0101 1603 P...............
0x0030: 0100 24df dca5 f8a1 8b4f 71de 93db 5d12 ..$......Oq...].
0x0040: 9c44 cdd9 555b bb7b 76d5 6b22 30af b533 .D..U[.{v.k"0..3
0x0050: 8522 b2f0 eed6 11 .".....
2015-03-31 11:32:18.236557 IP (tos 0x0, ttl 64, id 30791, offset 0, flags [DF], proto TCP (6), length 40)
ServerA.14033 > ServerB.8004: Flags [.], cksum 0x6307 (correct), seq 337483119, ack 1742986464, win 205, length 0
0x0000: 4500 0028 7847 4000 4006 baee 0a04 7a0e E..([email protected]@.....z.
0x0010: cefd b48a 36d1 1f44 141d 956f 67e3 dce0 ....6..D...og...
0x0020: 5010 00cd 6307 0000 P...c...
2015-03-31 11:32:28.200453 IP (tos 0x0, ttl 64, id 30792, offset 0, flags [DF], proto TCP (6), length 549)
ServerA.14033 > ServerB.8004: Flags [P.], cksum 0x09b2 (incorrect -> 0x3a9c), seq 337483119:337483628, ack 1742986464, win 205, length 509
0x0000: 4500 0225 7848 4000 4006 b8f0 0a04 7a0e E..%[email protected]@.....z.
0x0010: cefd b48a 36d1 1f44 141d 956f 67e3 dce0 ....6..D...og...
0x0020: 5018 00cd 09b2 0000 1703 0101 f8d4 7621 P.............v!
0x0030: 6c4f 7bf9 8de8 2ec8 048f fc38 37ee aa2a lO{........87..*
0x0040: ffe0 7052 95e1 3df8 a1fa 36c5 d1f2 bee9 ..pR..=...6.....
0x0050: 5b6f f4ab a895 5caf c024 2150 f52a dede [o....\..$!P.*..
0x0060: 4042 22bd a443 1d38 c85a 0c12 0cbc 2f07 @B"..C.8.Z..../.
0x0070: 7bf4 2cd4 f1f9 bacd 17d9 d456 f4be 47f1 {.,........V..G.
0x0080: 99c2 2f01 705f 2c8f 5b6c c4d9 041e 85b8 ../.p_,.[l......
0x0090: 7a44 6bde 499f b86b 8c46 d55a 5571 6026 zDk.I..k.F.ZUq`&
0x00a0: 6601 e57d b91b a45d e1c0 50c6 faaa 5eeb f..}...]..P...^.
0x00b0: afd7 4b72 3241 eb78 02a8 8787 35c7 214c ..Kr2A.x....5.!L
0x00c0: 9035 1741 dde5 3b40 3471 1627 575a 8235 .5.A..;@4q.'WZ.5
0x00d0: d256 2104 13c3 cdce cb9b abe2 4099 6e23 [email protected]#
0x00e0: 6548 a2f8 6b89 78f2 c02f 6576 6f8b d96a eH..k.x../evo..j
0x00f0: 2e82 bfb8 b5eb 3319 6fdb 6acd 45d5 bf32 ......3.o.j.E..2
0x0100: b212 e525 e366 7483 35c9 a1a5 aadd b394 ...%.ft.5.......
0x0110: 7aa5 5b60 fb7a ab4d 77ef d883 c117 0bdf z.[`.z.Mw.......
0x0120: 58b7 8778 a85f c5e1 b197 61e7 fdc5 e877 X..x._....a....w
0x0130: b66c 1e7e 32be 4c86 266a 225f 5e9a ec30 .l.~2.L.&j"_^..0
0x0140: be10 5d58 0787 a207 7d69 0aec bea2 4328 ..]X....}i....C(
0x0150: 2402 ab9d 52b3 0b0d a65b 3002 4ca6 dbec $...R....[0.L...
0x0160: b03a abe0 1164 254f 70b3 0515 f42a c54a .:...d%Op....*.J
0x0170: 9f26 1264 b6af 042b 27ef 74a9 73a1 930b .&.d...+'.t.s...
0x0180: 7083 5780 1c9d 54b4 dec5 2794 0e7c 1c92 p.W...T...'..|..
0x0190: 84ff a204 252a f85c 3c99 8e72 92a2 6645 ....%*.\ ServerA.14033: Flags [.], cksum 0x4dcc (correct), seq 1742986464, ack 337483628, win 5131, length 0
0x0000: 4500 0028 7803 0000 f706 4432 cefd b48a E..(x.....D2....
0x0010: 0a04 7a0e 1f44 36d1 67e3 dce0 141d 976c ..z..D6.g......l
0x0020: 5010 140b 4dcc 0000 0000 0000 0000 P...M.........
2015-03-31 11:32:28.352967 IP (tos 0x0, ttl 64, id 30793, offset 0, flags [DF], proto TCP (6), length 549)
ServerA.14033 > ServerB.8004: Flags [P.], cksum 0x09b2 (incorrect -> 0x6c1d), seq 337483628:337484137, ack 1742986464, win 205, length 509
0x0000: 4500 0225 7849 4000 4006 b8ef 0a04 7a0e E..%[email protected]@.....z.
0x0010: cefd b48a 36d1 1f44 141d 976c 67e3 dce0 ....6..D...lg...
0x0020: 5018 00cd 09b2 0000 1703 0101 f8a8 aec5 P...............
0x0030: 12bd 0d07 0766 9ae0 d9b4 ef64 21b5 51c4 .....f.....d!.Q.
0x0040: a9e1 2f5d c678 addc 7f3b 51c8 395e 2d18 ../].x...;Q.9^-.
0x0050: 782b 51ed 9fce cfb6 9221 d96f 6c1a de16 x+Q......!.ol...
0x0060: 2ad2 ef52 d984 c8a8 13c5 746d 99bc b4ed *..R......tm....
0x0070: c258 327e 0758 c5f6 6476 422c 3794 972d .X2~.X..dvB,7..-
0x0080: b018 e6e1 fa97 2b87 a8d4 d515 9799 ac35 ......+........5
0x0090: d5ae 878b b356 7b8d 4029 ec82 cc7b 408d .....V{[email protected])...{@.
0x00a0: 259a 9516 9104 91c9 1bd4 6957 2e31 a6a4 %.........iW.1..
0x00b0: 0232 1820 9424 f141 ef6a 13eb 3389 b012 .2...$.A.j..3...
0x00c0: 5643 d35e dd9f 0b62 296f e946 0efa 53de VC.^...b)o.F..S.
0x00d0: 20a2 fdcf cc38 55d1 57f8 f8f5 a76e 74d1 .....8U.W....nt.
0x00e0: 507a 7fc4 d09f 5882 4965 b222 6c3b 3c9e Pz....X.Ie."l;....H
0x01e0: eb32 a4aa 7036 3824 8e6b ca66 8e48 13fe .2..p68$.k.f.H..
0x01f0: 75e3 1ff2 a39c 3c20 bf6f 174f cb9b 6c02 u..... ServerA.14033: Flags [.], cksum 0x49d2 (correct), seq 1742986464, ack 337484137, win 5640, length 0
0x0000: 4500 0028 784a 0000 f706 43eb cefd b48a E..(xJ....C.....
0x0010: 0a04 7a0e 1f44 36d1 67e3 dce0 141d 9969 ..z..D6.g......i
0x0020: 5010 1608 49d2 0000 0000 0000 0000 P...I.........
2015-03-31 11:32:28.505265 IP (tos 0x0, ttl 64, id 30794, offset 0, flags [DF], proto TCP (6), length 549)
ServerA.14033 > ServerB.8004: Flags [P.], cksum 0x09b2 (incorrect -> 0x2232), seq 337484137:337484646, ack 1742986464, win 205, length 509
0x0000: 4500 0225 784a 4000 4006 b8ee 0a04 7a0e E..%[email protected]@.....z.
0x0010: cefd b48a 36d1 1f44 141d 9969 67e3 dce0 ....6..D...ig...
0x0020: 5018 00cd 09b2 0000 1703 0101 f84f 08ba P............O..
0x0030: f2eb 392d 0788 0e12 1914 8d29 db0b 61e4 ..9-.......)..a.
0x0040: 11c4 3e4d 0433 4eb5 758b 42ad 0581 d6b7 ..>M.3N.u.B.....
0x0050: a9ac 47e0 c858 5fbc 81b9 3991 8446 4b7d ..G..X_...9..FK}
0x0060: 3516 e09d 0202 ad55 67e6 d1da 6482 9e11 5......Ug...d...
0x0070: 1231 d4d4 bd77 264a 2117 549a fa15 9849 .1...w&J!.T....I
0x0080: 5019 1519 a62c 9e96 8623 c6d4 c669 ca4c P....,...#...i.L
0x0090: 1cdd c19c f8a9 95e6 4665 162e df93 e540 [email protected]
0x00a0: 0fb7 955f b277 26b9 8723 adef d4de 9877 ..._.w&..#.....w
0x00b0: f96d 1e35 736a b821 d46d 549f adcd 6672 .m.5sj.!.mT...fr
0x00c0: 4986 d7a5 3339 64ba b88c fd16 88c8 3ac8 I...39d.......:.
0x00d0: 83b0 e533 0ff8 cbb1 7c45 680b 06ed 9c47 ...3....|Eh....G
0x00e0: 1f9d 3837 aedb da12 670c bf51 22d8 f48f ..87....g..Q"...
0x00f0: bf40 f88e d4ed 4a0b 1d36 4eb9 ace9 c007 [email protected]
0x0100: 4f2d 9647 aec1 3b5c 1bf9 22a5 86a7 9d92 O-.G..;\..".....
0x0110: b44b 077e 3e84 03f8 97ce f07f f535 2e13 .K.~>........5..
0x0120: 9dd1 914a 2c61 599f 4ed5 e492 b3d4 5f0f ...J,aY.N....._.
0x0130: 6c61 235c a38b 5b2b 753d b328 22a8 8f8b la#\..[+u=.("...
0x0140: cc1e 75a1 67b4 84f4 fa2e b235 5ee6 a845 ..u.g......5^..E
0x0150: 0754 9599 7f46 f761 77d7 6328 e0cc fe1a .T...F.aw.c(....
0x0160: 5775 e892 e68d 003f d2c4 2c8c 8c65 5395 Wu.....?..,..eS.
0x0170: 16ac 91e3 f18c 7117 dfb6 c216 9cad acde ......q.........
0x0180: 3594 5ea7 9401 50c8 f8b7 eb7c 3e11 ddbf 5.^...P....|>...
0x0190: eaef 20ad 3030 2865 2963 c837 6edc 3580 ....00(e)c.7n.5.
0x01a0: b79c b88b f34c df62 47c0 cfaf d328 8090 .....L.bG....(..
0x01b0: 1f90 7f15 a38e c5ea 1faa 2e53 0b29 5840 ...........S.)[email protected]
0x01c0: 5b1e b5fb a7cb 8417 e62e 13ac b212 dc85 [...............
0x01d0: 2fb9 4708 0b72 ac9d 22bc 7c50 db62 0296 /.G..r..".|P.b..
0x01e0: 92f3 ad3e 279c e76b 2b1e 752b ac2b 100c ...>'..k+.u+.+..
0x01f0: 9290 09c7 1cd6 ba11 1e5c 13d3 b0c0 9d76 .........\.....v
0x0200: a6ab 0df5 10b3 7059 e74b 960d bc34 0371 ......pY.K...4.q
0x0210: 9715 4fcd f194 8fd7 28a2 feed faee 2f63 ..O.....(...../c
0x0220: a708 e77d 35 ...}5
2015-03-31 11:32:28.633819 IP (tos 0x0, ttl 247, id 30844, offset 0, flags [none], proto TCP (6), length 40)
ServerB.8004 > ServerA.14033: Flags [.], cksum 0x45d8 (correct), seq 1742986464, ack 337484646, win 6149, length 0
0x0000: 4500 0028 787c 0000 f706 43b9 cefd b48a E..(x|....C.....
0x0010: 0a04 7a0e 1f44 36d1 67e3 dce0 141d 9b66 ..z..D6.g......f
0x0020: 5010 1805 45d8 0000 0000 0000 0000 P...E.........
2015-03-31 11:32:28.656994 IP (tos 0x0, ttl 64, id 30795, offset 0, flags [DF], proto TCP (6), length 549)
ServerA.14033 > ServerB.8004: Flags [P.], cksum 0x09b2 (incorrect -> 0xfbfb), seq 337484646:337485155, ack 1742986464, win 205, length 509
0x0000: 4500 0225 784b 4000 4006 b8ed 0a04 7a0e E..%[email protected]@.....z.
0x0010: cefd b48a 36d1 1f44 141d 9b66 67e3 dce0 ....6..D...fg...
0x0020: 5018 00cd 09b2 0000 1703 0101 f8b8 e319 P...............
0x0030: c5b4 1996 a85d 2940 86ce 5908 c91e f700 .....])@..Y.....
0x0040: 9f7a 9c04 920b bcd3 c4e8 d15d 1842 c5c5 .z.........].B..
0x0050: 27fd e7a9 81f2 9894 d746 a850 6c82 a3eb '........F.Pl...
0x0060: f372 cd30 9998 612e e54a 81b7 f044 85cb .r.0..a..J...D..
0x0070: dff8 7554 4fdf d253 cb23 c538 0ff4 e08b ..uTO..S.#.8....
0x0080: 60a5 bdaf 60c1 0c19 6c25 baa8 c4bd f0f3 `...`...l%......
0x0090: fb46 9d7e 58c1 87d8 8cdc 6e01 155e fec5 .F.~X.....n..^..
0x00a0: a03f 97c2 3455 5fb7 1b4d 6ad1 7234 7f18 .?..4U_..Mj.r4..
0x00b0: c9a9 8b3d f5f2 f4cf 5f03 8bd6 6259 8dc8 ...=...._...bY..
0x00c0: 23c6 9dab f6eb 3ade cb9d 9b21 2cb7 b21d #.....:....!,...
0x00d0: 0cdb 4b18 e192 9390 94c2 98dd 6ef4 43ad ..K.........n.C.
0x00e0: 7512 2996 af87 e106 ed1e b12b 31d0 8bbf u.)........+1...
0x00f0: f6b1 8b09 e636 6ae8 f9e9 1bf0 aea9 c8da .....6j.........
0x0100: c49b b54e 28d2 dc16 431e fd8d cb34 be14 ...N(...C....4..
0x0110: 88fc cc7b 2f6f 4bac 2d02 124b 5be2 c1a2 ...{/oK.-..K[...
0x0120: 64ed 4b18 361a c883 5982 a624 d13f b3e6 d.K.6...Y..$.?..
0x0130: 7161 cddf 99e6 9f80 f061 2df2 30cc e410 qa.......a-.0...
0x0140: eb45 319d 34c7 26a0 2d3b e636 230e b0d1 .E1.4.&.-;.6#...
0x0150: c0e6 a6e6 8279 9a13 7def 28be 2e27 2915 .....y..}.(..').
0x0160: 8e02 b350 cd67 c41d e9fb f880 5a34 de1a ...P.g......Z4..
0x0170: b621 8017 68d9 6eca 54bb acc6 85ec a7d5 .!..h.n.T.......
0x0180: 4a2e 637b 4d4a 8e76 193d 0478 8bbf d283 J.c{MJ.v.=.x....
0x0190: 2f5a 43c1 4df8 3ef7 3143 8406 4a1a fc91 /ZC.M.>.1C..J...
0x01a0: ec98 65b6 a607 b49a d13b 0923 41f2 58b6 ..e......;.#A.X.
0x01b0: 410c 2670 5e1b 8d2a 4c2f 3e07 01d6 dd8c A.&p^..*L/>.....
0x01c0: d46c 22a3 e4d2 863a 50fb f134 3602 9b44 .l"....:P..46..D
0x01d0: f881 802d 0402 0a77 fe2e 7e51 90e8 7783 ...-...w..~Q..w.
0x01e0: 083c e00a b2e2 71d2 69c9 60d6 4598 6606 ..;,
0x0220: adaf 85c3 9a .....
2015-03-31 11:32:28.787452 IP (tos 0x0, ttl 246, id 30877, offset 0, flags [none], proto TCP (6), length 40)
ServerB.8004 > ServerA.14033: Flags [.], cksum 0x41de (correct), seq 1742986464, ack 337485155, win 6658, length 0
0x0000: 4500 0028 789d 0000 f606 4498 cefd b48a E..(x.....D.....
0x0010: 0a04 7a0e 1f44 36d1 67e3 dce0 141d 9d63 ..z..D6.g......c
0x0020: 5010 1a02 41de 0000 0000 0000 0000 P...A.........
...
...
2015-03-31 11:32:30.442259 IP (tos 0x0, ttl 64, id 30806, offset 0, flags [DF], proto TCP (6), length 76)
ServerA.14033 > ServerB.8004: Flags [P.], cksum 0x07d9 (incorrect -> 0x05c7), seq 337490003:337490039, ack 1742986464, win 205, length 36
0x0000: 4500 004c 7856 4000 4006 babb 0a04 7a0e [email protected]@.....z.
0x0010: cefd b48a 36d1 1f44 141d b053 67e3 dce0 ....6..D...Sg...
0x0020: 5018 00cd 07d9 0000 1703 0100 1f19 7220 P.............r.
0x0030: 2042 f717 9a51 08ca d19b c82b 18bd 28db .B...Q.....+..(.
0x0040: 8d53 b59f afe6 a382 fd47 6f79 .S.......Goy
2015-03-31 11:32:30.442690 IP (tos 0x0, ttl 64, id 30807, offset 0, flags [DF], proto TCP (6), length 40)
ServerA.14033 > ServerB.8004: Flags [F.], cksum 0x47fe (correct), seq 337490039, ack 1742986464, win 205, length 0
0x0000: 4500 0028 7857 4000 4006 bade 0a04 7a0e E..([email protected]@.....z.
0x0010: cefd b48a 36d1 1f44 141d b077 67e3 dce0 ....6..D...wg...
0x0020: 5011 00cd 47fe 0000 P...G...
2015-03-31 11:32:30.471398 IP (tos 0x0, ttl 247, id 31726, offset 0, flags [none], proto TCP (6), length 40)
ServerB.8004 > ServerA.14033: Flags [.], cksum 0x1bb5 (correct), seq 1742986464, ack 337490040, win 11542, length 0
0x0000: 4500 0028 7bee 0000 f706 4047 cefd b48a E..({[email protected]
0x0010: 0a04 7a0e 1f44 36d1 67e3 dce0 141d b078 ..z..D6.g......x
0x0020: 5010 2d16 1bb5 0000 0000 0000 0000 P.-...........
2015-03-31 11:32:30.594848 IP (tos 0x0, ttl 246, id 31815, offset 0, flags [none], proto TCP (6), length 40)
ServerB.8004 > ServerA.14033: Flags [F.], cksum 0x1bb4 (correct), seq 1742986464, ack 337490040, win 11542, length 0
0x0000: 4500 0028 7c47 0000 f606 40ee cefd b48a E..(|[email protected]
0x0010: 0a04 7a0e 1f44 36d1 67e3 dce0 141d b078 ..z..D6.g......x
0x0020: 5011 2d16 1bb4 0000 0000 0000 0000 P.-...........
2015-03-31 11:32:30.594865 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 40)
ServerA.14033 > ServerB.8004: Flags [.], cksum 0x47fd (correct), seq 337490040, ack 1742986465, win 205, length 0
0x0000: 4500 0028 0000 4000 4006 3336 0a04 7a0e E..([email protected]@.36..z.
0x0010: cefd b48a 36d1 1f44 141d b078 67e3 dce1 ....6..D...xg...
0x0020: 5010 00cd 47fd 0000 P...G...
查找一个很好的TCP教程，并特别查看覆盖标志（SYN，ACK，RST，FIN，PSH，URG），序列号和确认编号的部分。一个系统发送的确认号码告诉远端到目前为止收到了什么数据包... – twalberg 2015-03-31 16:51:03
感谢您对@twalberg的评论。我读了tcp/ip的wiki。现在这个tcpdump日志更有意义。我看到了建立连接的三次握手（[S]，[S.]，[。]）和4路连接终止（[F。]，[。]，[F。]，[。]））。通过了解序列号和确认，可以看到数据正在发送到服务器，并且服务器正在发回确认。 – Ali 2015-04-10 17:01:12