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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.. ..@.@......n.......)..
  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.. ..@.@..A...n^.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. E..r.z@.1..9^.y....n.D...^..INVITE sip:+447479189410@domain.com;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:+447479189410@domain.com;transport=udp>
  16. From: <sip:+447984977774@domain.com>;tag=z9hG4bK66305466
  17. Call-ID: 720153239504@10.121.239.28
  18. CSeq: 1 INVITE
  19. Contact: <sip:+447984977774@10.121.239.28:33940;transport=udp>
  20. Expires: 3600
  21. User-Agent: domain/1.6.1/ONE A2003
  22. Content-Length: 375
  23. Content-Type: application/sdp
  24.  
  25. v=0
  26. o=user 0 0 IN IP4 10.121.239.28
  27. s=Session SIP/SDP
  28. c=IN IP4 10.121.239.28
  29. t=0 0
  30. a=ice-ufrag:fcpie
  31. a=ice-pwd:5jmr7tq9hg8p1bksamspm6ui4i
  32. m=audio 21000 RTP/AVP 201 101
  33. a=rtpmap:201 OPUS/48000
  34. a=rtpmap:101 telephone-event/8000
  35. a=fmtp:101 0-15
  36. a=candidate:1 1 udp 2130706431 10.121.239.28 21000 typ host
  37. a=candidate:1 2 udp 2130706430 10.121.239.28 21001 typ host
  38.  
  39. IP (tos 0x10, ttl 64, id 56245, offset 0, flags [DF], proto UDP (17), length 375)
  40. 162.249.6.110.sip > 94.197.121.154.62788: [bad udp cksum 0x833b -> 0x0f49!] UDP, length 347
  41. E..w..@.@......n^.y....D.c.;SIP/2.0 100 Giving a try
  42. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  43. To: <sip:+447479189410@domain.com;transport=udp>
  44. From: <sip:+447984977774@domain.com>;tag=z9hG4bK66305466
  45. Call-ID: 720153239504@10.121.239.28
  46. CSeq: 1 INVITE
  47. Server: OpenSIPS (2.1.1 (x86_64/linux))
  48. Content-Length: 0
  49.  
  50.  
  51. IP (tos 0x10, ttl 64, id 7842, offset 0, flags [DF], proto UDP (17), length 1033)
  52. 162.249.6.110.sip > 188.29.164.243.45353: [bad udp cksum 0x0e7f -> 0x8e53!] UDP, length 1005
  53. ....n.......)....INVITE sip:+447479189410@10.45.155.206:49148;transport=udp SIP/2.0
  54. Record-Route: <sip:162.249.6.110;lr;nat=yes>
  55. Via: SIP/2.0/UDP 162.249.6.110:5060;branch=z9hG4bK7432.36a62733.0
  56. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  57. Max-Forwards: 69
  58. To: <sip:+447479189410@domain.com;transport=udp>
  59. From: <sip:+447984977774@domain.com>;tag=z9hG4bK66305466
  60. Call-ID: 720153239504@10.121.239.28
  61. CSeq: 1 INVITE
  62. Contact: <sip:+447984977774@94.197.121.154:62788;transport=udp>
  63. Expires: 3600
  64. User-Agent: domain/1.6.1/ONE A2003
  65. Content-Length: 375
  66. Content-Type: application/sdp
  67.  
  68. v=0
  69. o=user 0 0 IN IP4 10.121.239.28
  70. s=Session SIP/SDP
  71. c=IN IP4 10.121.239.28
  72. t=0 0
  73. a=ice-ufrag:fcpie
  74. a=ice-pwd:5jmr7tq9hg8p1bksamspm6ui4i
  75. m=audio 21000 RTP/AVP 201 101
  76. a=rtpmap:201 OPUS/48000
  77. a=rtpmap:101 telephone-event/8000
  78. a=fmtp:101 0-15
  79. a=candidate:1 1 udp 2130706431 10.121.239.28 21000 typ host
  80. a=candidate:1 2 udp 2130706430 10.121.239.28 21001 typ host
  81.  
  82. IP (tos 0x10, ttl 64, id 7843, offset 0, flags [DF], proto UDP (17), length 1033)
  83. 162.249.6.110.sip > 188.29.164.243.45353: [bad udp cksum 0x0e7f -> 0x8e53!] UDP, length 1005
  84. ....n.......)....INVITE sip:+447479189410@10.45.155.206:49148;transport=udp SIP/2.0
  85. Record-Route: <sip:162.249.6.110;lr;nat=yes>
  86. Via: SIP/2.0/UDP 162.249.6.110:5060;branch=z9hG4bK7432.36a62733.0
  87. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  88. Max-Forwards: 69
  89. To: <sip:+447479189410@domain.com;transport=udp>
  90. From: <sip:+447984977774@domain.com>;tag=z9hG4bK66305466
  91. Call-ID: 720153239504@10.121.239.28
  92. CSeq: 1 INVITE
  93. Contact: <sip:+447984977774@94.197.121.154:62788;transport=udp>
  94. Expires: 3600
  95. User-Agent: domain/1.6.1/ONE A2003
  96. Content-Length: 375
  97. Content-Type: application/sdp
  98.  
  99. v=0
  100. o=user 0 0 IN IP4 10.121.239.28
  101. s=Session SIP/SDP
  102. c=IN IP4 10.121.239.28
  103. t=0 0
  104. a=ice-ufrag:fcpie
  105. a=ice-pwd:5jmr7tq9hg8p1bksamspm6ui4i
  106. m=audio 21000 RTP/AVP 201 101
  107. a=rtpmap:201 OPUS/48000
  108. a=rtpmap:101 telephone-event/8000
  109. a=fmtp:101 0-15
  110. a=candidate:1 1 udp 2130706431 10.121.239.28 21000 typ host
  111. a=candidate:1 2 udp 2130706430 10.121.239.28 21001 typ host
  112.  
  113. IP (tos 0x10, ttl 64, id 7844, offset 0, flags [DF], proto UDP (17), length 1033)
  114. 162.249.6.110.sip > 188.29.164.243.45353: [bad udp cksum 0x0e7f -> 0x8e53!] UDP, length 1005
  115. ....n.......)....INVITE sip:+447479189410@10.45.155.206:49148;transport=udp SIP/2.0
  116. Record-Route: <sip:162.249.6.110;lr;nat=yes>
  117. Via: SIP/2.0/UDP 162.249.6.110:5060;branch=z9hG4bK7432.36a62733.0
  118. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  119. Max-Forwards: 69
  120. To: <sip:+447479189410@domain.com;transport=udp>
  121. From: <sip:+447984977774@domain.com>;tag=z9hG4bK66305466
  122. Call-ID: 720153239504@10.121.239.28
  123. CSeq: 1 INVITE
  124. Contact: <sip:+447984977774@94.197.121.154:62788;transport=udp>
  125. Expires: 3600
  126. User-Agent: domain/1.6.1/ONE A2003
  127. Content-Length: 375
  128. Content-Type: application/sdp
  129.  
  130. v=0
  131. o=user 0 0 IN IP4 10.121.239.28
  132. s=Session SIP/SDP
  133. c=IN IP4 10.121.239.28
  134. t=0 0
  135. a=ice-ufrag:fcpie
  136. a=ice-pwd:5jmr7tq9hg8p1bksamspm6ui4i
  137. m=audio 21000 RTP/AVP 201 101
  138. a=rtpmap:201 OPUS/48000
  139. a=rtpmap:101 telephone-event/8000
  140. a=fmtp:101 0-15
  141. a=candidate:1 1 udp 2130706431 10.121.239.28 21000 typ host
  142. a=candidate:1 2 udp 2130706430 10.121.239.28 21001 typ host
  143.  
  144. IP (tos 0x10, ttl 64, id 7845, offset 0, flags [DF], proto UDP (17), length 1033)
  145. 162.249.6.110.sip > 188.29.164.243.45353: [bad udp cksum 0x0e7f -> 0x8e53!] UDP, length 1005
  146. ....n.......)....INVITE sip:+447479189410@10.45.155.206:49148;transport=udp SIP/2.0
  147. Record-Route: <sip:162.249.6.110;lr;nat=yes>
  148. Via: SIP/2.0/UDP 162.249.6.110:5060;branch=z9hG4bK7432.36a62733.0
  149. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  150. Max-Forwards: 69
  151. To: <sip:+447479189410@domain.com;transport=udp>
  152. From: <sip:+447984977774@domain.com>;tag=z9hG4bK66305466
  153. Call-ID: 720153239504@10.121.239.28
  154. CSeq: 1 INVITE
  155. Contact: <sip:+447984977774@94.197.121.154:62788;transport=udp>
  156. Expires: 3600
  157. User-Agent: domain/1.6.1/ONE A2003
  158. Content-Length: 375
  159. Content-Type: application/sdp
  160.  
  161. v=0
  162. o=user 0 0 IN IP4 10.121.239.28
  163. s=Session SIP/SDP
  164. c=IN IP4 10.121.239.28
  165. t=0 0
  166. a=ice-ufrag:fcpie
  167. a=ice-pwd:5jmr7tq9hg8p1bksamspm6ui4i
  168. m=audio 21000 RTP/AVP 201 101
  169. a=rtpmap:201 OPUS/48000
  170. a=rtpmap:101 telephone-event/8000
  171. a=fmtp:101 0-15
  172. a=candidate:1 1 udp 2130706431 10.121.239.28 21000 typ host
  173. a=candidate:1 2 udp 2130706430 10.121.239.28 21001 typ host
  174.  
  175. IP (tos 0x10, ttl 64, id 7846, offset 0, flags [DF], proto UDP (17), length 32)
  176. 162.249.6.110.sip > 188.29.164.243.45353: [bad udp cksum 0x0a96 -> 0x3070!] UDP, length 4
  177. E.. ..@.@......n.......)..
  178. .....
  179. IP (tos 0x10, ttl 64, id 56246, offset 0, flags [DF], proto UDP (17), length 420)
  180. 162.249.6.110.sip > 94.197.121.154.62788: [bad udp cksum 0x8368 -> 0xe180!] UDP, length 392
  181. E.....@.@......n^.y....D...hSIP/2.0 408 Request Timeout
  182. Via: SIP/2.0/UDP 10.121.239.28:33940;received=94.197.121.154;rport=62788;branch=z9hG4bK34177
  183. To: <sip:+447479189410@domain.com;transport=udp>;tag=364660755d8ca6c0205a1abd0319a354-02a7
  184. From: <sip:+447984977774@domain.com>;tag=z9hG4bK66305466
  185. Call-ID: 720153239504@10.121.239.28
  186. CSeq: 1 INVITE
  187. Server: OpenSIPS (2.1.1 (x86_64/linux))
  188. Content-Length: 0
  189.  
  190.  
  191. IP (tos 0x0, ttl 49, id 57211, offset 0, flags [DF], proto UDP (17), length 431)
  192. 94.197.121.154.62788 > 162.249.6.110.sip: [udp sum ok] UDP, length 403
  193. E....{@.1...^.y....n.D......ACK sip:+447479189410@domain.com;transport=udp SIP/2.0
  194. Via: SIP/2.0/UDP 10.121.239.28:33940;rport;branch=z9hG4bK34177
  195. Max-Forwards: 70
  196. To: <sip:+447479189410@domain.com;transport=udp>;tag=364660755d8ca6c0205a1abd0319a354-02a7
  197. From: <sip:+447984977774@domain.com>;tag=z9hG4bK66305466
  198. Call-ID: 720153239504@10.121.239.28
  199. CSeq: 1 ACK
  200. User-Agent: domain/1.6.1/ONE A2003
  201. Content-Length: 0
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