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TCP IP issue

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Nov 12th, 2014
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  1. I am trying to understand the flow of TCP dump data from my server to client. On this i suddenly noticed a single byte packet(NULL) packet from server.
  2.  
  3. 1. Is this some test push packet or what?? confused
  4. 2.Is it valid to send a single byte packet
  5.  
  6. Received packet:
  7.  
  8.  
  9. 20:50:22.678979 IP (tos 0x0, ttl 64, id 1170, offset 0, flags [DF], proto TCP (6), length 63)
  10. 172.11.105.5.49524 > 172.250.10.10.13824: Flags [P.], cksum 0x8108 (correct), seq 3097912253:3097912264, ack 1457045851, win 2003, options [nop,nop,TS val 73187943 ecr 645999009], length 11
  11. 0x0000: 4500 003f 0492 4000 4006 6a12 ac0b 6905 E..?..@.@.j...i.
  12. 0x0010: acfa 0a0a c174 3600 b8a6 63bd 56d8 c15b .....t6...c.V..[
  13. 0x0020: 8018 07d3 8108 0000 0101 080a 045c c267 .............\.g
  14. 0x0030: 2681 29a1 0009 3232 1c38 3237 1c1c 42 &.)...22.827..B
  15. 20:50:22.803355 IP (tos 0x0, ttl 59, id 51818, offset 0, flags [DF], proto TCP (6), length 52)
  16. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [.], cksum 0x227c (correct), seq 1457045851, ack 3097912264, win 17680, options [nop,nop,TS val 645999039 ecr 73187943], length 0
  17. 0x0000: 4500 0034 ca6a 4000 3b06 a944 acfa 0a0a E..4.j@.;..D....
  18. 0x0010: ac0b 6905 3600 c174 56d8 c15b b8a6 63c8 ..i.6..tV..[..c.
  19. 0x0020: 8010 4510 227c 0000 0101 080a 2681 29bf ..E."|......&.).
  20. 0x0030: 045c c267 .\.g
  21. 20:50:34.452789 IP (tos 0x0, ttl 64, id 1171, offset 0, flags [DF], proto TCP (6), length 74)
  22. 172.11.105.5.49524 > 172.250.10.10.13824: Flags [P.], cksum 0xa539 (correct), seq 3097912264:3097912286, ack 1457045851, win 2003, options [nop,nop,TS val 73190886 ecr 645999039], length 22
  23. 0x0000: 4500 004a 0493 4000 4006 6a06 ac0b 6905 E..J..@.@.j...i.
  24. 0x0010: acfa 0a0a c174 3600 b8a6 63c8 56d8 c15b .....t6...c.V..[
  25. 0x0020: 8018 07d3 a539 0000 0101 080a 045c cde6 .....9.......\..
  26. 0x0030: 2681 29bf 0014 3132 1c38 3237 1c1c 4831 &.)...12.827..H1
  27. 0x0040: 1c31 1c30 301c 3131 3131 .1.00.1111
  28. 20:50:34.573847 IP (tos 0x0, ttl 59, id 51819, offset 0, flags [DF], proto TCP (6), length 52)
  29. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [.], cksum 0x124e (correct), seq 1457045851, ack 3097912286, win 17680, options [nop,nop,TS val 646000216 ecr 73190886], length 0
  30. 0x0000: 4500 0034 ca6b 4000 3b06 a943 acfa 0a0a E..4.k@.;..C....
  31. 0x0010: ac0b 6905 3600 c174 56d8 c15b b8a6 63de ..i.6..tV..[..c.
  32. 0x0020: 8010 4510 124e 0000 0101 080a 2681 2e58 ..E..N......&..X
  33. 0x0030: 045c cde6 .\..
  34. 20:52:34.472819 IP (tos 0x0, ttl 59, id 51820, offset 0, flags [DF], proto TCP (6), length 53)
  35. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0xe36f (correct), seq 1457045850:1457045851, ack 3097912286, win 17680, options [nop,nop,TS val 646012206 ecr 73190886], length 1
  36. 0x0000: 4500 0035 ca6c 4000 3b06 a941 acfa 0a0a E..5.l@.;..A....
  37. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63de ..i.6..tV..Z..c.
  38. 0x0020: 8018 4510 e36f 0000 0101 080a 2681 5d2e ..E..o......&.].
  39. 0x0030: 045c cde6 00 .\...
  40. 20:52:34.472864 IP (tos 0x0, ttl 64, id 1172, offset 0, flags [DF], proto TCP (6), length 64)
  41. 172.11.105.5.49524 > 172.250.10.10.13824: Flags [.], cksum 0x4501 (correct), seq 3097912286, ack 1457045851, win 2003, options [nop,nop,TS val 73220891 ecr 646012206,nop,nop,sack 1 {1457045850:1457045851}], length 0
  42. 0x0000: 4500 0040 0494 4000 4006 6a0f ac0b 6905 E..@..@.@.j...i.
  43. 0x0010: acfa 0a0a c174 3600 b8a6 63de 56d8 c15b .....t6...c.V..[
  44. 0x0020: b010 07d3 4501 0000 0101 080a 045d 431b ....E........]C.
  45. 0x0030: 2681 5d2e 0101 050a 56d8 c15a 56d8 c15b &.].....V..ZV..[
  46. 20:54:34.503825 IP (tos 0x0, ttl 59, id 51821, offset 0, flags [DF], proto TCP (6), length 53)
  47. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0x3f57 (correct), seq 1457045850:1457045851, ack 3097912286, win 17680, options [nop,nop,TS val 646024209 ecr 73220891], length 1
  48. 0x0000: 4500 0035 ca6d 4000 3b06 a940 acfa 0a0a E..5.m@.;..@....
  49. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63de ..i.6..tV..Z..c.
  50. 0x0020: 8018 4510 3f57 0000 0101 080a 2681 8c11 ..E.?W......&...
  51. 0x0030: 045d 431b 00 .]C..
  52. 20:54:34.503900 IP (tos 0x0, ttl 64, id 1173, offset 0, flags [DF], proto TCP (6), length 64)
  53. 172.11.105.5.49524 > 172.250.10.10.13824: Flags [.], cksum 0xa0e5 (correct), seq 3097912286, ack 1457045851, win 2003, options [nop,nop,TS val 73250899 ecr 646024209,nop,nop,sack 1 {1457045850:1457045851}], length 0
  54. 0x0000: 4500 0040 0495 4000 4006 6a0e ac0b 6905 E..@..@.@.j...i.
  55. 0x0010: acfa 0a0a c174 3600 b8a6 63de 56d8 c15b .....t6...c.V..[
  56. 0x0020: b010 07d3 a0e5 0000 0101 080a 045d b853 .............].S
  57. 0x0030: 2681 8c11 0101 050a 56d8 c15a 56d8 c15b &.......V..ZV..[
  58. 20:56:22.714345 IP (tos 0x0, ttl 64, id 1174, offset 0, flags [DF], proto TCP (6), length 74)
  59. 172.11.105.5.49524 > 172.250.10.10.13824: Flags [P.], cksum 0xeeb5 (correct), seq 3097912286:3097912308, ack 1457045851, win 2003, options [nop,nop,TS val 73277952 ecr 646024209], length 22
  60. 0x0000: 4500 004a 0496 4000 4006 6a03 ac0b 6905 E..J..@.@.j...i.
  61. 0x0010: acfa 0a0a c174 3600 b8a6 63de 56d8 c15b .....t6...c.V..[
  62. 0x0020: 8018 07d3 eeb5 0000 0101 080a 045e 2200 .............^".
  63. 0x0030: 2681 8c11 0014 3132 1c38 3237 1c1c 4831 &.....12.827..H1
  64. 0x0040: 1c31 1c30 301c 3131 3131 .1.00.1111
  65. 20:56:22.834567 IP (tos 0x0, ttl 59, id 51822, offset 0, flags [DF], proto TCP (6), length 52)
  66. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [.], cksum 0x3612 (correct), seq 1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646035042 ecr 73277952], length 0
  67. 0x0000: 4500 0034 ca6e 4000 3b06 a940 acfa 0a0a E..4.n@.;..@....
  68. 0x0010: ac0b 6905 3600 c174 56d8 c15b b8a6 63f4 ..i.6..tV..[..c.
  69. 0x0020: 8010 4510 3612 0000 0101 080a 2681 b662 ..E.6.......&..b
  70. 0x0030: 045e 2200 .^".
  71. 20:58:22.734520 IP (tos 0x0, ttl 59, id 51823, offset 0, flags [DF], proto TCP (6), length 53)
  72. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0x0734 (correct), seq 1457045850:1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646047032 ecr 73277952], length 1
  73. 0x0000: 4500 0035 ca6f 4000 3b06 a93e acfa 0a0a E..5.o@.;..>....
  74. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63f4 ..i.6..tV..Z..c.
  75. 0x0020: 8018 4510 0734 0000 0101 080a 2681 e538 ..E..4......&..8
  76. 0x0030: 045e 2200 00 .^"..
  77. 20:58:22.734650 IP (tos 0x0, ttl 64, id 1175, offset 0, flags [DF], proto TCP (6), length 64)
  78. 172.11.105.5.49524 > 172.250.10.10.13824: Flags [.], cksum 0x68c5 (correct), seq 3097912308, ack 1457045851, win 2003, options [nop,nop,TS val 73307957 ecr 646047032,nop,nop,sack 1 {1457045850:1457045851}], length 0
  79. 0x0000: 4500 0040 0497 4000 4006 6a0c ac0b 6905 E..@..@.@.j...i.
  80. 0x0010: acfa 0a0a c174 3600 b8a6 63f4 56d8 c15b .....t6...c.V..[
  81. 0x0020: b010 07d3 68c5 0000 0101 080a 045e 9735 ....h........^.5
  82. 0x0030: 2681 e538 0101 050a 56d8 c15a 56d8 c15b &..8....V..ZV..[
  83. 20:58:23.154813 IP (tos 0x0, ttl 59, id 51824, offset 0, flags [DF], proto TCP (6), length 53)
  84. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0x070a (correct), seq 1457045850:1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646047074 ecr 73277952], length 1
  85. 0x0000: 4500 0035 ca70 4000 3b06 a93d acfa 0a0a E..5.p@.;..=....
  86. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63f4 ..i.6..tV..Z..c.
  87. 0x0020: 8018 4510 070a 0000 0101 080a 2681 e562 ..E.........&..b
  88. 0x0030: 045e 2200 00 .^"..
  89. 20:58:23.154858 IP (tos 0x0, ttl 64, id 1176, offset 0, flags [DF], proto TCP (6), length 64)
  90. 172.11.105.5.49524 > 172.250.10.10.13824: Flags [.], cksum 0x6832 (correct), seq 3097912308, ack 1457045851, win 2003, options [nop,nop,TS val 73308062 ecr 646047074,nop,nop,sack 1 {1457045850:1457045851}], length 0
  91. 0x0000: 4500 0040 0498 4000 4006 6a0b ac0b 6905 E..@..@.@.j...i.
  92. 0x0010: acfa 0a0a c174 3600 b8a6 63f4 56d8 c15b .....t6...c.V..[
  93. 0x0020: b010 07d3 6832 0000 0101 080a 045e 979e ....h2.......^..
  94. 0x0030: 2681 e562 0101 050a 56d8 c15a 56d8 c15b &..b....V..ZV..[
  95. 20:58:23.995012 IP (tos 0x0, ttl 59, id 51825, offset 0, flags [DF], proto TCP (6), length 53)
  96. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0x06b6 (correct), seq 1457045850:1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646047158 ecr 73277952], length 1
  97. 0x0000: 4500 0035 ca71 4000 3b06 a93c acfa 0a0a E..5.q@.;..<....
  98. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63f4 ..i.6..tV..Z..c.
  99. 0x0020: 8018 4510 06b6 0000 0101 080a 2681 e5b6 ..E.........&...
  100. 0x0030: 045e 2200 00 .^"..
  101. 20:58:23.995057 IP (tos 0x0, ttl 64, id 1177, offset 0, flags [DF], proto TCP (6), length 64)
  102. 172.11.105.5.49524 > 172.250.10.10.13824: Flags [.], cksum 0x670c (correct), seq 3097912308, ack 1457045851, win 2003, options [nop,nop,TS val 73308272 ecr 646047158,nop,nop,sack 1 {1457045850:1457045851}], length 0
  103. 0x0000: 4500 0040 0499 4000 4006 6a0a ac0b 6905 E..@..@.@.j...i.
  104. 0x0010: acfa 0a0a c174 3600 b8a6 63f4 56d8 c15b .....t6...c.V..[
  105. 0x0020: b010 07d3 670c 0000 0101 080a 045e 9870 ....g........^.p
  106. 0x0030: 2681 e5b6 0101 050a 56d8 c15a 56d8 c15b &.......V..ZV..[
  107. 20:58:25.676543 IP (tos 0x0, ttl 59, id 51826, offset 0, flags [DF], proto TCP (6), length 53)
  108. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0x060e (correct), seq 1457045850:1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646047326 ecr 73277952], length 1
  109. 0x0000: 4500 0035 ca72 4000 3b06 a93b acfa 0a0a E..5.r@.;..;....
  110. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63f4 ..i.6..tV..Z..c.
  111. 0x0020: 8018 4510 060e 0000 0101 080a 2681 e65e ..E.........&..^
  112. 0x0030: 045e 2200 00 .^"..
  113. 20:58:25.676587 IP (tos 0x0, ttl 64, id 1178, offset 0, flags [DF], proto TCP (6), length 64)
  114. 172.11.105.5.49524 > 172.250.10.10.13824: Flags [.], cksum 0x64c0 (correct), seq 3097912308, ack 1457045851, win 2003, options [nop,nop,TS val 73308692 ecr 646047326,nop,nop,sack 1 {1457045850:1457045851}], length 0
  115. 0x0000: 4500 0040 049a 4000 4006 6a09 ac0b 6905 E..@..@.@.j...i.
  116. 0x0010: acfa 0a0a c174 3600 b8a6 63f4 56d8 c15b .....t6...c.V..[
  117. 0x0020: b010 07d3 64c0 0000 0101 080a 045e 9a14 ....d........^..
  118. 0x0030: 2681 e65e 0101 050a 56d8 c15a 56d8 c15b &..^....V..ZV..[
  119. 20:58:29.024492 IP (tos 0x0, ttl 59, id 51827, offset 0, flags [DF], proto TCP (6), length 53)
  120. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0x04bf (correct), seq 1457045850:1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646047661 ecr 73277952], length 1
  121. 0x0000: 4500 0035 ca73 4000 3b06 a93a acfa 0a0a E..5.s@.;..:....
  122. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63f4 ..i.6..tV..Z..c.
  123. 0x0020: 8018 4510 04bf 0000 0101 080a 2681 e7ad ..E.........&...
  124. 0x0030: 045e 2200 00 .^"..
  125. 20:58:29.024553 IP (tos 0x0, ttl 64, id 1179, offset 0, flags [DF], proto TCP (6), length 64)
  126. 172.11.105.5.49524 > 172.250.10.10.13824: Flags [.], cksum 0x602c (correct), seq 3097912308, ack 1457045851, win 2003, options [nop,nop,TS val 73309529 ecr 646047661,nop,nop,sack 1 {1457045850:1457045851}], length 0
  127. 0x0000: 4500 0040 049b 4000 4006 6a08 ac0b 6905 E..@..@.@.j...i.
  128. 0x0010: acfa 0a0a c174 3600 b8a6 63f4 56d8 c15b .....t6...c.V..[
  129. 0x0020: b010 07d3 602c 0000 0101 080a 045e 9d59 ....`,.......^.Y
  130. 0x0030: 2681 e7ad 0101 050a 56d8 c15a 56d8 c15b &.......V..ZV..[
  131. 20:58:35.724820 IP (tos 0x0, ttl 59, id 51828, offset 0, flags [DF], proto TCP (6), length 53)
  132. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0x0221 (correct), seq 1457045850:1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646048331 ecr 73277952], length 1
  133. 0x0000: 4500 0035 ca74 4000 3b06 a939 acfa 0a0a E..5.t@.;..9....
  134. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63f4 ..i.6..tV..Z..c.
  135. 0x0020: 8018 4510 0221 0000 0101 080a 2681 ea4b ..E..!......&..K
  136. 0x0030: 045e 2200 00 .^"..
  137. 20:58:49.114541 IP (tos 0x0, ttl 59, id 51829, offset 0, flags [DF], proto TCP (6), length 53)
  138. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0xfce5 (correct), seq 1457045850:1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646049670 ecr 73277952], length 1
  139. 0x0000: 4500 0035 ca75 4000 3b06 a938 acfa 0a0a E..5.u@.;..8....
  140. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63f4 ..i.6..tV..Z..c.
  141. 0x0020: 8018 4510 fce5 0000 0101 080a 2681 ef86 ..E.........&...
  142. 0x0030: 045e 2200 00 .^"..
  143. 20:59:15.877966 IP (tos 0x0, ttl 59, id 51830, offset 0, flags [DF], proto TCP (6), length 53)
  144. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0xf271 (correct), seq 1457045850:1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646052346 ecr 73277952], length 1
  145. 0x0000: 4500 0035 ca76 4000 3b06 a937 acfa 0a0a E..5.v@.;..7....
  146. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63f4 ..i.6..tV..Z..c.
  147. 0x0020: 8018 4510 f271 0000 0101 080a 2681 f9fa ..E..q......&...
  148. 0x0030: 045e 2200 00 .^"..
  149. 21:00:09.386655 IP (tos 0x0, ttl 59, id 51831, offset 0, flags [DF], proto TCP (6), length 53)
  150. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0xdd8a (correct), seq 1457045850:1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646057697 ecr 73277952], length 1
  151. 0x0000: 4500 0035 ca77 4000 3b06 a936 acfa 0a0a E..5.w@.;..6....
  152. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63f4 ..i.6..tV..Z..c.
  153. 0x0020: 8018 4510 dd8a 0000 0101 080a 2682 0ee1 ..E.........&...
  154. 0x0030: 045e 2200 00 .^"..
  155. 21:01:09.395209 IP (tos 0x0, ttl 59, id 51832, offset 0, flags [DF], proto TCP (6), length 53)
  156. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0xc619 (correct), seq 1457045850:1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646063698 ecr 73277952], length 1
  157. 0x0000: 4500 0035 ca78 4000 3b06 a935 acfa 0a0a E..5.x@.;..5....
  158. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63f4 ..i.6..tV..Z..c.
  159. 0x0020: 8018 4510 c619 0000 0101 080a 2682 2652 ..E.........&.&R
  160. 0x0030: 045e 2200 00 .^"..
  161. 21:02:09.413207 IP (tos 0x0, ttl 59, id 51833, offset 0, flags [DF], proto TCP (6), length 53)
  162. 172.250.10.10.13824 > 172.11.105.5.49524: Flags [P.], cksum 0xaea8 (correct), seq 1457045850:1457045851, ack 3097912308, win 17680, options [nop,nop,TS val 646069699 ecr 73277952], length 1
  163. 0x0000: 4500 0035 ca79 4000 3b06 a934 acfa 0a0a E..5.y@.;..4....
  164. 0x0010: ac0b 6905 3600 c174 56d8 c15a b8a6 63f4 ..i.6..tV..Z..c.
  165. 0x0020: 8018 4510 aea8 0000 0101 080a 2682 3dc3 ..E.........&.=.
  166. 0x0030: 045e 2200 00 .^"..
  167. 21:21:38.131726 IP (tos 0x0, ttl 64, id 33002, offset 0, flags [DF], proto TCP (6), length 60)
  168. 172.11.105.5.51724 > 172.250.10.10.13824: Flags [S], cksum 0x86a2 (correct), seq 2334091042, win 5840, options [mss 1460,sackOK,TS val 73656264 ecr 0,nop,wscale 5], length 0
  169. 0x0000: 4500 003c 80ea 4000 4006 edbc ac0b 6905 E..<..@.@.....i.
  170. 0x0010: acfa 0a0a ca0c 3600 8b1f 6722 0000 0000 ......6...g"....
  171. 0x0020: a002 16d0 86a2 0000 0204 05b4 0402 080a ................
  172. 0x0030: 0463 e7c8 0000 0000 0103 0305 .c..........
  173. 21:21:38.961507 IP (tos 0x0, ttl 64, id 33003, offset 0, flags [DF], proto TCP (6), length 60)
  174. 172.11.105.5.51724 > 172.250.10.10.13824: Flags [S], cksum 0x83b4 (correct), seq 2334091042, win 5840, options [mss 1460,sackOK,TS val 73657014 ecr 0,nop,wscale 5], length 0
  175. 0x0000: 4500 003c 80eb 4000 4006 edbb ac0b 6905 E..<..@.@.....i.
  176. 0x0010: acfa 0a0a ca0c 3600 8b1f 6722 0000 0000 ......6...g"....
  177. 0x0020: a002 16d0 83b4 0000 0204 05b4 0402 080a ................
  178. 0x0030: 0463 eab6 0000 0000 0103 0305 .c..........
  179. 21:21:42.993153 IP (tos 0x0, ttl 64, id 25124, offset 0, flags [DF], proto TCP (6), length 60)
  180. 172.11.105.5.46734 > 172.250.10.10.13824: Flags [S], cksum 0x674e (correct), seq 2444594305, win 5840, options [mss 1460,sackOK,TS val 73658021 ecr 0,nop,wscale 5], length 0
  181. 0x0000: 4500 003c 6224 4000 4006 0c83 ac0b 6905 E..<b$@.@.....i.
  182. 0x0010: acfa 0a0a b68e 3600 91b5 8c81 0000 0000 ......6.........
  183. 0x0020: a002 16d0 674e 0000 0204 05b4 0402 080a ....gN..........
  184. 0x0030: 0463 eea5 0000 0000 0103 0305 .c..........
  185. 21:21:45.989421 IP (tos 0x0, ttl 64, id 25125, offset 0, flags [DF], proto TCP (6), length 60)
  186. 172.11.105.5.46734 > 172.250.10.10.13824: Flags [S], cksum 0x6460 (correct), seq 2444594305, win 5840, options [mss 1460,sackOK,TS val 73658771 ecr 0,nop,wscale 5], length 0
  187. 0x0000: 4500 003c 6225 4000 4006 0c82 ac0b 6905 E..<b%@.@.....i.
  188. 0x0010: acfa 0a0a b68e 3600 91b5 8c81 0000 0000 ......6.........
  189. 0x0020: a002 16d0 6460 0000 0204 05b4 0402 080a ....d`..........
  190. 0x0030: 0463 f193 0000 0000 0103 0305 .c..........
  191. 21:21:50.021978 IP (tos 0x0, ttl 64, id 19432, offset 0, flags [DF], proto TCP (6), length 60)
  192. 172.11.105.5.59752 > 172.250.10.10.13824: Flags [S], cksum 0xf51f (correct), seq 2554445419, win 5840, options [mss 1460,sackOK,TS val 73659779 ecr 0,nop,wscale 5], length 0
  193. 0x0000: 4500 003c 4be8 4000 4006 22bf ac0b 6905 E..<K.@.@."...i.
  194. 0x0010: acfa 0a0a e968 3600 9841 be6b 0000 0000 .....h6..A.k....
  195. 0x0020: a002 16d0 f51f 0000 0204 05b4 0402 080a ................
  196. 0x0030: 0463 f583 0000 0000 0103 0305 .c..........
  197. 21:44:50.305388 IP (tos 0x0, ttl 64, id 38919, offset 0, flags [DF], proto TCP (6), length 60)
  198. 172.11.105.5.35609 > 172.250.10.10.13824: Flags [S], cksum 0x22be (correct), seq 2717163894, win 5840, options [mss 1460,sackOK,TS val 74004849 ecr 0,nop,wscale 5], length 0
  199. 0x0000: 4500 003c 9807 4000 4006 d69f ac0b 6905 E..<..@.@.....i.
  200. 0x0010: acfa 0a0a 8b19 3600 a1f4 a176 0000 0000 ......6....v....
  201. 0x0020: a002 16d0 22be 0000 0204 05b4 0402 080a ...."...........
  202. 0x0030: 0469 3971 0000 0000 0103 0305 .i9q........
  203. 21:44:53.302410 IP (tos 0x0, ttl 64, id 38920, offset 0, flags [DF], proto TCP (6), length 60)
  204. 172.11.105.5.35609 > 172.250.10.10.13824: Flags [S], cksum 0x1fd0 (correct), seq 2717163894, win 5840, options [mss 1460,sackOK,TS val 74005599 ecr 0,nop,wscale 5], length 0
  205. 0x0000: 4500 003c 9808 4000 4006 d69e ac0b 6905 E..<..@.@.....i.
  206. 0x0010: acfa 0a0a 8b19 3600 a1f4 a176 0000 0000 ......6....v....
  207. 0x0020: a002 16d0 1fd0 0000 0204 05b4 0402 080a ................
  208. 0x0030: 0469 3c5f 0000 0000 0103 0305 .i<_........
  209. 21:44:57.334343 IP (tos 0x0, ttl 64, id 21665, offset 0, flags [DF], proto TCP (6), length 60)
  210. 172.11.105.5.33864 > 172.250.10.10.13824: Flags [S], cksum 0xa8d0 (correct), seq 2824672495, win 5840, options [mss 1460,sackOK,TS val 74006606 ecr 0,nop,wscale 5], length 0
  211. 0x0000: 4500 003c 54a1 4000 4006 1a06 ac0b 6905 E..<T.@.@.....i.
  212. 0x0010: acfa 0a0a 8448 3600 a85d 14ef 0000 0000 .....H6..]......
  213. 0x0020: a002 16d0 a8d0 0000 0204 05b4 0402 080a ................
  214. 0x0030: 0469 404e 0000 0000 0103 0305 .i@N........
  215. 21:56:22.827264 IP (tos 0x0, ttl 64, id 3102, offset 0, flags [DF], proto TCP (6), length 60)
  216. 172.11.105.5.34649 > 172.250.10.10.13824: Flags [S], cksum 0xc8e0 (correct), seq 664328058, win 5840, options [mss 1460,sackOK,TS val 74177380 ecr 0,nop,wscale 5], length 0
  217. 0x0000: 4500 003c 0c1e 4000 4006 6289 ac0b 6905 E..<..@.@.b...i.
  218. 0x0010: acfa 0a0a 8759 3600 2798 d77a 0000 0000 .....Y6.'..z....
  219. 0x0020: a002 16d0 c8e0 0000 0204 05b4 0402 080a ................
  220. 0x0030: 046b db64 0000 0000 0103 0305 .k.d........
  221.  
  222.  
  223. ALso, During 21.05 time we even tried to send a request to server from client. But, the info has been logged in our log but it doesn't reflect in TCPDUMP. So surpising
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