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  1. # tcpdump -nqt -s 0 -A -vvv -i eth0 port 5060
  2. tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
  3. IP (tos 0x10, ttl 64, id 7841, offset 0, flags [DF], proto UDP (17), length 32)
  4. 162.249.6.110.sip > 188.29.164.243.45353: [bad udp cksum 0x0a96 -> 0x3070!] UDP, length 4
  5. E.. ..@[email protected].......)..
  6. .....
  7. IP (tos 0x10, ttl 64, id 56244, offset 0, flags [DF], proto UDP (17), length 32)
  8. 162.249.6.110.sip > 94.197.121.154.62788: [bad udp cksum 0x81e4 -> 0x7506!] UDP, length 4
  9. E.. ..@[email protected]^.y....D........
  10. IP (tos 0x0, ttl 49, id 57210, offset 0, flags [DF], proto UDP (17), length 882)
  11. 94.197.121.154.62788 > 162.249.6.110.sip: [udp sum ok] UDP, length 854
  12. [email protected]^.y....n.D...^..INVITE sip:[email protected];transport=udp SIP/2.0
  13. Via: SIP/2.0/UDP 10.121.239.28:33940;rport;branch=z9hG4bK34177
  14. Max-Forwards: 70
  15. To: <sip:[email protected];transport=udp>
  16. From: <sip:[email protected]>;tag=z9hG4bK66305466
  17. CSeq: 1 INVITE
  18. Contact: <sip:[email protected]:33940;transport=udp>
  19. Expires: 3600
  20. User-Agent: domain/1.6.1/ONE A2003
  21. Content-Length: 375
  22. Content-Type: application/sdp
  23.  
  24. v=0
  25. o=user 0 0 IN IP4 10.121.239.28
  26. s=Session SIP/SDP
  27. c=IN IP4 10.121.239.28
  28. t=0 0
  29. a=ice-ufrag:fcpie
  30. a=ice-pwd:5jmr7tq9hg8p1bksamspm6ui4i
  31. m=audio 21000 RTP/AVP 201 101
  32. a=rtpmap:201 OPUS/48000
  33. a=rtpmap:101 telephone-event/8000
  34. a=fmtp:101 0-15
  35. a=candidate:1 1 udp 2130706431 10.121.239.28 21000 typ host
  36. a=candidate:1 2 udp 2130706430 10.121.239.28 21001 typ host
  37.  
  38. IP (tos 0x10, ttl 64, id 56245, offset 0, flags [DF], proto UDP (17), length 375)
  39. 162.249.6.110.sip > 94.197.121.154.62788: [bad udp cksum 0x833b -> 0x0f49!] UDP, length 347
  40. E..w..@[email protected]^.y....D.c.;SIP/2.0 100 Giving a try
  41. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  42. To: <sip:[email protected];transport=udp>
  43. From: <sip:[email protected]>;tag=z9hG4bK66305466
  44. CSeq: 1 INVITE
  45. Server: OpenSIPS (2.1.1 (x86_64/linux))
  46. Content-Length: 0
  47.  
  48.  
  49. IP (tos 0x10, ttl 64, id 7842, offset 0, flags [DF], proto UDP (17), length 1033)
  50. 162.249.6.110.sip > 188.29.164.243.45353: [bad udp cksum 0x0e7f -> 0x8e53!] UDP, length 1005
  51. ....n.......)....INVITE sip:[email protected]:49148;transport=udp SIP/2.0
  52. Record-Route: <sip:162.249.6.110;lr;nat=yes>
  53. Via: SIP/2.0/UDP 162.249.6.110:5060;branch=z9hG4bK7432.36a62733.0
  54. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  55. Max-Forwards: 69
  56. To: <sip:[email protected];transport=udp>
  57. From: <sip:[email protected]>;tag=z9hG4bK66305466
  58. CSeq: 1 INVITE
  59. Contact: <sip:[email protected]:62788;transport=udp>
  60. Expires: 3600
  61. User-Agent: domain/1.6.1/ONE A2003
  62. Content-Length: 375
  63. Content-Type: application/sdp
  64.  
  65. v=0
  66. o=user 0 0 IN IP4 10.121.239.28
  67. s=Session SIP/SDP
  68. c=IN IP4 10.121.239.28
  69. t=0 0
  70. a=ice-ufrag:fcpie
  71. a=ice-pwd:5jmr7tq9hg8p1bksamspm6ui4i
  72. m=audio 21000 RTP/AVP 201 101
  73. a=rtpmap:201 OPUS/48000
  74. a=rtpmap:101 telephone-event/8000
  75. a=fmtp:101 0-15
  76. a=candidate:1 1 udp 2130706431 10.121.239.28 21000 typ host
  77. a=candidate:1 2 udp 2130706430 10.121.239.28 21001 typ host
  78.  
  79. IP (tos 0x10, ttl 64, id 7843, offset 0, flags [DF], proto UDP (17), length 1033)
  80. 162.249.6.110.sip > 188.29.164.243.45353: [bad udp cksum 0x0e7f -> 0x8e53!] UDP, length 1005
  81. ....n.......)....INVITE sip:[email protected]:49148;transport=udp SIP/2.0
  82. Record-Route: <sip:162.249.6.110;lr;nat=yes>
  83. Via: SIP/2.0/UDP 162.249.6.110:5060;branch=z9hG4bK7432.36a62733.0
  84. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  85. Max-Forwards: 69
  86. To: <sip:[email protected];transport=udp>
  87. From: <sip:[email protected]>;tag=z9hG4bK66305466
  88. CSeq: 1 INVITE
  89. Contact: <sip:[email protected]:62788;transport=udp>
  90. Expires: 3600
  91. User-Agent: domain/1.6.1/ONE A2003
  92. Content-Length: 375
  93. Content-Type: application/sdp
  94.  
  95. v=0
  96. o=user 0 0 IN IP4 10.121.239.28
  97. s=Session SIP/SDP
  98. c=IN IP4 10.121.239.28
  99. t=0 0
  100. a=ice-ufrag:fcpie
  101. a=ice-pwd:5jmr7tq9hg8p1bksamspm6ui4i
  102. m=audio 21000 RTP/AVP 201 101
  103. a=rtpmap:201 OPUS/48000
  104. a=rtpmap:101 telephone-event/8000
  105. a=fmtp:101 0-15
  106. a=candidate:1 1 udp 2130706431 10.121.239.28 21000 typ host
  107. a=candidate:1 2 udp 2130706430 10.121.239.28 21001 typ host
  108.  
  109. IP (tos 0x10, ttl 64, id 7844, offset 0, flags [DF], proto UDP (17), length 1033)
  110. 162.249.6.110.sip > 188.29.164.243.45353: [bad udp cksum 0x0e7f -> 0x8e53!] UDP, length 1005
  111. ....n.......)....INVITE sip:[email protected]:49148;transport=udp SIP/2.0
  112. Record-Route: <sip:162.249.6.110;lr;nat=yes>
  113. Via: SIP/2.0/UDP 162.249.6.110:5060;branch=z9hG4bK7432.36a62733.0
  114. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  115. Max-Forwards: 69
  116. To: <sip:[email protected];transport=udp>
  117. From: <sip:[email protected]>;tag=z9hG4bK66305466
  118. CSeq: 1 INVITE
  119. Contact: <sip:[email protected]:62788;transport=udp>
  120. Expires: 3600
  121. User-Agent: domain/1.6.1/ONE A2003
  122. Content-Length: 375
  123. Content-Type: application/sdp
  124.  
  125. v=0
  126. o=user 0 0 IN IP4 10.121.239.28
  127. s=Session SIP/SDP
  128. c=IN IP4 10.121.239.28
  129. t=0 0
  130. a=ice-ufrag:fcpie
  131. a=ice-pwd:5jmr7tq9hg8p1bksamspm6ui4i
  132. m=audio 21000 RTP/AVP 201 101
  133. a=rtpmap:201 OPUS/48000
  134. a=rtpmap:101 telephone-event/8000
  135. a=fmtp:101 0-15
  136. a=candidate:1 1 udp 2130706431 10.121.239.28 21000 typ host
  137. a=candidate:1 2 udp 2130706430 10.121.239.28 21001 typ host
  138.  
  139. IP (tos 0x10, ttl 64, id 7845, offset 0, flags [DF], proto UDP (17), length 1033)
  140. 162.249.6.110.sip > 188.29.164.243.45353: [bad udp cksum 0x0e7f -> 0x8e53!] UDP, length 1005
  141. ....n.......)....INVITE sip:[email protected]:49148;transport=udp SIP/2.0
  142. Record-Route: <sip:162.249.6.110;lr;nat=yes>
  143. Via: SIP/2.0/UDP 162.249.6.110:5060;branch=z9hG4bK7432.36a62733.0
  144. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  145. Max-Forwards: 69
  146. To: <sip:[email protected];transport=udp>
  147. From: <sip:[email protected]>;tag=z9hG4bK66305466
  148. CSeq: 1 INVITE
  149. Contact: <sip:[email protected]:62788;transport=udp>
  150. Expires: 3600
  151. User-Agent: domain/1.6.1/ONE A2003
  152. Content-Length: 375
  153. Content-Type: application/sdp
  154.  
  155. v=0
  156. o=user 0 0 IN IP4 10.121.239.28
  157. s=Session SIP/SDP
  158. c=IN IP4 10.121.239.28
  159. t=0 0
  160. a=ice-ufrag:fcpie
  161. a=ice-pwd:5jmr7tq9hg8p1bksamspm6ui4i
  162. m=audio 21000 RTP/AVP 201 101
  163. a=rtpmap:201 OPUS/48000
  164. a=rtpmap:101 telephone-event/8000
  165. a=fmtp:101 0-15
  166. a=candidate:1 1 udp 2130706431 10.121.239.28 21000 typ host
  167. a=candidate:1 2 udp 2130706430 10.121.239.28 21001 typ host
  168.  
  169. IP (tos 0x10, ttl 64, id 7846, offset 0, flags [DF], proto UDP (17), length 32)
  170. 162.249.6.110.sip > 188.29.164.243.45353: [bad udp cksum 0x0a96 -> 0x3070!] UDP, length 4
  171. E.. ..@[email protected].......)..
  172. .....
  173. IP (tos 0x10, ttl 64, id 56246, offset 0, flags [DF], proto UDP (17), length 420)
  174. 162.249.6.110.sip > 94.197.121.154.62788: [bad udp cksum 0x8368 -> 0xe180!] UDP, length 392
  175. E.....@[email protected]^.y....D...hSIP/2.0 408 Request Timeout
  176. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  177. To: <sip:[email protected];transport=udp>;tag=364660755d8ca6c0205a1abd0319a354-02a7
  178. From: <sip:[email protected]>;tag=z9hG4bK66305466
  179. CSeq: 1 INVITE
  180. Server: OpenSIPS (2.1.1 (x86_64/linux))
  181. Content-Length: 0
  182.  
  183.  
  184. IP (tos 0x0, ttl 49, id 57211, offset 0, flags [DF], proto UDP (17), length 431)
  185. 94.197.121.154.62788 > 162.249.6.110.sip: [udp sum ok] UDP, length 403
  186. E....{@.1...^.y....n.D......ACK sip:[email protected];transport=udp SIP/2.0
  187. Via: SIP/2.0/UDP 10.121.239.28:33940;rport;branch=z9hG4bK34177
  188. Max-Forwards: 70
  189. To: <sip:[email protected];transport=udp>;tag=364660755d8ca6c0205a1abd0319a354-02a7
  190. From: <sip:[email protected]>;tag=z9hG4bK66305466
  191. CSeq: 1 ACK
  192. User-Agent: domain/1.6.1/ONE A2003
  193. Content-Length: 0
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