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  1. tcpdump -i eth2 host 172.25.59.229 and port 5060 -v
  2. tcpdump: listening on eth2, link-type EN10MB (Ethernet), capture size 65535 bytes
  3. 15:14:53.588292 IP (tos 0x30, ttl 64, id 40199, offset 0, flags [none], proto UDP (17), length 1273)
  4. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 1245
  5. INVITE sip:[email protected] SIP/2.0
  6. Via: SIP/2.0/UDP 172.25.59.229:59066;branch=z9hG4bK144519717;rport
  7. Route: <sip:172.25.59.164:5060;lr>
  8. From: "104" <sip:[email protected]>;tag=206264998
  9. To: <sip:[email protected]>
  10. CSeq: 2020 INVITE
  11. Contact: "104" <sip:[email protected]:59066>
  12. X-Grandstream-PBX: true
  13. Max-Forwards: 70
  14. User-Agent: Grandstream GXP1628 1.0.4.17
  15. Privacy: none
  16. P-Preferred-Identity: "104" <sip:[email protected]>
  17. P-Access-Network-Info: IEEE-EUI-48;eui-48-addr=00-08-A2-0F-7D-9E
  18. P-Emergency-Info: IEEE-EUI-48;eui-48-addr=00-0B-82-A1-39-F6
  19. Supported: replaces, path, timer
  20. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  21. Content-Type: application/sdp
  22. Accept: application/sdp, application/dtmf-relay
  23. Content-Length: 404
  24.  
  25. v=0
  26. o=104 8000 8000 IN IP4 172.25.59.229
  27. s=SIP Call
  28. c=IN IP4 172.25.59.229
  29. t=0 0
  30. m=audio 10032 RTP/AVP 0 8 4 18 9 97 2 101
  31. a=sendrecv
  32. a=rtpmap:0 PCMU/8000
  33. a=ptime:20
  34. a=rtpmap:8 PCMA/8000
  35. a=rtpmap:4 G723/8000
  36. a=rtpmap:18 G729/8000
  37. a=fmtp:18 annexb=no
  38. a=rtpmap:9 G722/8000
  39. a=rtpmap:97 iLBC/8000
  40. a=fmtp:97 mode=30
  41. a=rtpmap:2 G726-32/8000
  42. a=rtpmap:101 telephone-event/8000
  43. a=fmtp:101 0-15
  44.  
  45. 15:14:53.589136 IP (tos 0x60, ttl 64, id 52322, offset 0, flags [none], proto UDP (17), length 558)
  46. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 530
  47. SIP/2.0 401 Unauthorized
  48. Via: SIP/2.0/UDP 172.25.59.229:59066;branch=z9hG4bK144519717;received=172.25.59.229;rport=59066
  49. From: "104" <sip:[email protected]>;tag=206264998
  50. To: <sip:[email protected]>;tag=as4b444ce8
  51. CSeq: 2020 INVITE
  52. Server: FPBX-13.0.197(13.23.1)
  53. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  54. Supported: replaces, timer
  55. WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="3a5dfaf9"
  56. Content-Length: 0
  57.  
  58.  
  59. 15:14:53.608135 IP (tos 0x30, ttl 64, id 40200, offset 0, flags [none], proto UDP (17), length 343)
  60. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 315
  61. ACK sip:[email protected] SIP/2.0
  62. Via: SIP/2.0/UDP 172.25.59.229:59066;branch=z9hG4bK144519717;rport
  63. Route: <sip:172.25.59.164:5060;lr>
  64. From: "104" <sip:[email protected]>;tag=206264998
  65. To: <sip:[email protected]>;tag=as4b444ce8
  66. CSeq: 2020 ACK
  67. Content-Length: 0
  68.  
  69.  
  70. 15:14:53.620306 IP (tos 0x30, ttl 64, id 40201, offset 0, flags [none], proto UDP (17), length 1436)
  71. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 1408
  72. INVITE sip:[email protected] SIP/2.0
  73. Via: SIP/2.0/UDP 172.25.59.229:59066;branch=z9hG4bK795293499;rport
  74. Route: <sip:172.25.59.164:5060;lr>
  75. From: "104" <sip:[email protected]>;tag=206264998
  76. To: <sip:[email protected]>
  77. CSeq: 2021 INVITE
  78. Contact: "104" <sip:[email protected]:59066>
  79. Authorization: Digest username="104", realm="asterisk", nonce="3a5dfaf9", uri="sip:[email protected]", response="9070c6254795296de12fb03622e241b6", algorithm=MD5
  80. X-Grandstream-PBX: true
  81. Max-Forwards: 70
  82. User-Agent: Grandstream GXP1628 1.0.4.17
  83. Privacy: none
  84. P-Preferred-Identity: "104" <sip:[email protected]>
  85. P-Access-Network-Info: IEEE-EUI-48;eui-48-addr=00-08-A2-0F-7D-9E
  86. P-Emergency-Info: IEEE-EUI-48;eui-48-addr=00-0B-82-A1-39-F6
  87. Supported: replaces, path, timer
  88. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  89. Content-Type: application/sdp
  90. Accept: application/sdp, application/dtmf-relay
  91. Content-Length: 404
  92.  
  93. v=0
  94. o=104 8000 8000 IN IP4 172.25.59.229
  95. s=SIP Call
  96. c=IN IP4 172.25.59.229
  97. t=0 0
  98. m=audio 10032 RTP/AVP 0 8 4 18 9 97 2 101
  99. a=sendrecv
  100. a=rtpmap:0 PCMU/8000
  101. a=ptime:20
  102. a=rtpmap:8 PCMA/8000
  103. a=rtpmap:4 G723/8000
  104. a=rtpmap:18 G729/8000
  105. a=fmtp:18 annexb=no
  106. a=rtpmap:9 G722/8000
  107. a=rtpmap:97 iLBC/8000
  108. a=fmtp:97 mode=30
  109. a=rtpmap:2 G726-32/8000
  110. a=rtpmap:101 telephone-event/8000
  111. a=fmtp:101 0-15
  112.  
  113. 15:14:53.629280 IP (tos 0x60, ttl 64, id 52323, offset 0, flags [none], proto UDP (17), length 695)
  114. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 667
  115. NOTIFY sip:[email protected]:59066 SIP/2.0
  116. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK306f7510;rport
  117. Max-Forwards: 70
  118. From: <sip:[email protected]>;tag=as624a00cb
  119. To: <sip:[email protected]>;tag=750432846
  120. Contact: <sip:[email protected]:5060>
  121. CSeq: 114 NOTIFY
  122. User-Agent: FPBX-13.0.197(13.23.1)
  123. Subscription-State: active
  124. Event: dialog
  125. Content-Type: application/dialog-info+xml
  126. Content-Length: 204
  127.  
  128. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="12" state="full" entity="sip:[email protected]">\0x0a<dialog id="104">\0x0a<state>confirmed</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  129. 15:14:53.629702 IP (tos 0x60, ttl 64, id 52324, offset 0, flags [none], proto UDP (17), length 537)
  130. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 509
  131. SIP/2.0 100 Trying
  132. Via: SIP/2.0/UDP 172.25.59.229:59066;branch=z9hG4bK795293499;received=172.25.59.229;rport=59066
  133. From: "104" <sip:[email protected]>;tag=206264998
  134. To: <sip:[email protected]>
  135. CSeq: 2021 INVITE
  136. Server: FPBX-13.0.197(13.23.1)
  137. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  138. Supported: replaces, timer
  139. Session-Expires: 1800;refresher=uas
  140. Contact: <sip:[email protected]:5060>
  141. Content-Length: 0
  142.  
  143.  
  144. 15:14:53.644057 IP (tos 0x30, ttl 64, id 40202, offset 0, flags [none], proto UDP (17), length 494)
  145. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 466
  146. SIP/2.0 200 OK
  147. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK306f7510;rport=5060
  148. From: <sip:[email protected]>;tag=as624a00cb
  149. To: <sip:[email protected]>;tag=750432846
  150. CSeq: 114 NOTIFY
  151. Contact: <sip:[email protected]:59066>
  152. Supported: replaces, path, timer
  153. User-Agent: Grandstream GXP1628 1.0.4.17
  154. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  155. Content-Length: 0
  156.  
  157.  
  158. 15:14:53.887552 IP (tos 0x60, ttl 64, id 52325, offset 0, flags [none], proto UDP (17), length 715)
  159. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 687
  160. NOTIFY sip:[email protected]:59066 SIP/2.0
  161. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK75f4fcd8;rport
  162. Max-Forwards: 70
  163. From: <sip:[email protected]>;tag=as03638f86
  164. To: <sip:[email protected]>;tag=2047173811
  165. Contact: <sip:[email protected]:5060>
  166. CSeq: 118 NOTIFY
  167. User-Agent: FPBX-13.0.197(13.23.1)
  168. Subscription-State: active
  169. Event: dialog
  170. Content-Type: application/dialog-info+xml
  171. Content-Length: 222
  172.  
  173. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="16" state="full" entity="sip:[email protected]">\0x0a<dialog id="109" direction="recipient">\0x0a<state>early</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  174. 15:14:53.888663 IP (tos 0x60, ttl 64, id 52326, offset 0, flags [none], proto UDP (17), length 553)
  175. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 525
  176. SIP/2.0 180 Ringing
  177. Via: SIP/2.0/UDP 172.25.59.229:59066;branch=z9hG4bK795293499;received=172.25.59.229;rport=59066
  178. From: "104" <sip:[email protected]>;tag=206264998
  179. To: <sip:[email protected]>;tag=as326edc7b
  180. CSeq: 2021 INVITE
  181. Server: FPBX-13.0.197(13.23.1)
  182. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  183. Supported: replaces, timer
  184. Session-Expires: 1800;refresher=uas
  185. Contact: <sip:[email protected]:5060>
  186. Content-Length: 0
  187.  
  188.  
  189. 15:14:53.897872 IP (tos 0x30, ttl 64, id 40203, offset 0, flags [none], proto UDP (17), length 496)
  190. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 468
  191. SIP/2.0 200 OK
  192. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK75f4fcd8;rport=5060
  193. From: <sip:[email protected]>;tag=as03638f86
  194. To: <sip:[email protected]>;tag=2047173811
  195. CSeq: 118 NOTIFY
  196. Contact: <sip:[email protected]:59066>
  197. Supported: replaces, path, timer
  198. User-Agent: Grandstream GXP1628 1.0.4.17
  199. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  200. Content-Length: 0
  201.  
  202.  
  203. 15:14:57.255610 IP (tos 0x60, ttl 64, id 52327, offset 0, flags [none], proto UDP (17), length 698)
  204. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 670
  205. NOTIFY sip:[email protected]:59066 SIP/2.0
  206. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK66e0d0ef;rport
  207. Max-Forwards: 70
  208. From: <sip:[email protected]>;tag=as64a725e6
  209. To: <sip:[email protected]>;tag=1027093110
  210. Contact: <sip:[email protected]:5060>
  211. CSeq: 115 NOTIFY
  212. User-Agent: FPBX-13.0.197(13.23.1)
  213. Subscription-State: active
  214. Event: dialog
  215. Content-Type: application/dialog-info+xml
  216. Content-Length: 205
  217.  
  218. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="13" state="full" entity="sip:[email protected]">\0x0a<dialog id="108">\0x0a<state>terminated</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  219. 15:14:57.267568 IP (tos 0x30, ttl 64, id 40204, offset 0, flags [none], proto UDP (17), length 496)
  220. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 468
  221. SIP/2.0 200 OK
  222. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK66e0d0ef;rport=5060
  223. From: <sip:[email protected]>;tag=as64a725e6
  224. To: <sip:[email protected]>;tag=1027093110
  225. CSeq: 115 NOTIFY
  226. Contact: <sip:[email protected]:59066>
  227. Supported: replaces, path, timer
  228. User-Agent: Grandstream GXP1628 1.0.4.17
  229. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  230. Content-Length: 0
  231.  
  232.  
  233. 15:15:00.287680 IP (tos 0x60, ttl 64, id 52328, offset 0, flags [none], proto UDP (17), length 698)
  234. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 670
  235. NOTIFY sip:[email protected]:59066 SIP/2.0
  236. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK70bff413;rport
  237. Max-Forwards: 70
  238. From: <sip:[email protected]>;tag=as03638f86
  239. To: <sip:[email protected]>;tag=2047173811
  240. Contact: <sip:[email protected]:5060>
  241. CSeq: 119 NOTIFY
  242. User-Agent: FPBX-13.0.197(13.23.1)
  243. Subscription-State: active
  244. Event: dialog
  245. Content-Type: application/dialog-info+xml
  246. Content-Length: 205
  247.  
  248. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="17" state="full" entity="sip:[email protected]">\0x0a<dialog id="109">\0x0a<state>terminated</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  249. 15:15:00.297397 IP (tos 0x30, ttl 64, id 40205, offset 0, flags [none], proto UDP (17), length 496)
  250. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 468
  251. SIP/2.0 200 OK
  252. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK70bff413;rport=5060
  253. From: <sip:[email protected]>;tag=as03638f86
  254. To: <sip:[email protected]>;tag=2047173811
  255. CSeq: 119 NOTIFY
  256. Contact: <sip:[email protected]:59066>
  257. Supported: replaces, path, timer
  258. User-Agent: Grandstream GXP1628 1.0.4.17
  259. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  260. Content-Length: 0
  261.  
  262.  
  263. 15:15:00.386284 IP (tos 0x60, ttl 64, id 52329, offset 0, flags [none], proto UDP (17), length 902)
  264. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 874
  265. SIP/2.0 200 OK
  266. Via: SIP/2.0/UDP 172.25.59.229:59066;branch=z9hG4bK795293499;received=172.25.59.229;rport=59066
  267. From: "104" <sip:[email protected]>;tag=206264998
  268. To: <sip:[email protected]>;tag=as326edc7b
  269. CSeq: 2021 INVITE
  270. Server: FPBX-13.0.197(13.23.1)
  271. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  272. Supported: replaces, timer
  273. Session-Expires: 1800;refresher=uas
  274. Contact: <sip:[email protected]:5060>
  275. Content-Type: application/sdp
  276. Require: timer
  277. Content-Length: 305
  278.  
  279. v=0
  280. o=root 1511139454 1511139454 IN IP4 172.25.59.164
  281. s=Asterisk PBX 13.23.1
  282. c=IN IP4 172.25.59.164
  283. t=0 0
  284. m=audio 11110 RTP/AVP 0 8 2 101
  285. a=rtpmap:0 PCMU/8000
  286. a=rtpmap:8 PCMA/8000
  287. a=rtpmap:2 G726-32/8000
  288. a=rtpmap:101 telephone-event/8000
  289. a=fmtp:101 0-16
  290. a=ptime:20
  291. a=maxptime:150
  292. a=sendrecv
  293.  
  294. 15:15:00.403341 IP (tos 0x30, ttl 64, id 40206, offset 0, flags [none], proto UDP (17), length 563)
  295. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 535
  296. ACK sip:[email protected]:5060 SIP/2.0
  297. Via: SIP/2.0/UDP 172.25.59.229:59066;branch=z9hG4bK1554181845;rport
  298. From: "104" <sip:[email protected]>;tag=206264998
  299. To: <sip:[email protected]>;tag=as326edc7b
  300. CSeq: 2021 ACK
  301. Contact: <sip:[email protected]:59066>
  302. X-Grandstream-PBX: true
  303. Max-Forwards: 70
  304. Supported: replaces, path, timer
  305. User-Agent: Grandstream GXP1628 1.0.4.17
  306. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  307. Content-Length: 0
  308.  
  309.  
  310. 15:15:02.387047 IP (tos 0x30, ttl 64, id 40207, offset 0, flags [none], proto UDP (17), length 563)
  311. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 535
  312. BYE sip:[email protected]:5060 SIP/2.0
  313. Via: SIP/2.0/UDP 172.25.59.229:59066;branch=z9hG4bK1937060724;rport
  314. From: "104" <sip:[email protected]>;tag=206264998
  315. To: <sip:[email protected]>;tag=as326edc7b
  316. CSeq: 2022 BYE
  317. Contact: <sip:[email protected]:59066>
  318. X-Grandstream-PBX: true
  319. Max-Forwards: 70
  320. Supported: replaces, path, timer
  321. User-Agent: Grandstream GXP1628 1.0.4.17
  322. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  323. Content-Length: 0
  324.  
  325.  
  326. 15:15:02.388487 IP (tos 0x60, ttl 64, id 52330, offset 0, flags [none], proto UDP (17), length 470)
  327. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 442
  328. SIP/2.0 200 OK
  329. Via: SIP/2.0/UDP 172.25.59.229:59066;branch=z9hG4bK1937060724;received=172.25.59.229;rport=59066
  330. From: "104" <sip:[email protected]>;tag=206264998
  331. To: <sip:[email protected]>;tag=as326edc7b
  332. CSeq: 2022 BYE
  333. Server: FPBX-13.0.197(13.23.1)
  334. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  335. Supported: replaces, timer
  336. Content-Length: 0
  337.  
  338.  
  339. 15:15:02.408034 IP (tos 0x60, ttl 64, id 52331, offset 0, flags [none], proto UDP (17), length 696)
  340. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 668
  341. NOTIFY sip:[email protected]:59066 SIP/2.0
  342. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK6d1093a4;rport
  343. Max-Forwards: 70
  344. From: <sip:[email protected]>;tag=as624a00cb
  345. To: <sip:[email protected]>;tag=750432846
  346. Contact: <sip:[email protected]:5060>
  347. CSeq: 115 NOTIFY
  348. User-Agent: FPBX-13.0.197(13.23.1)
  349. Subscription-State: active
  350. Event: dialog
  351. Content-Type: application/dialog-info+xml
  352. Content-Length: 205
  353.  
  354. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="13" state="full" entity="sip:[email protected]">\0x0a<dialog id="104">\0x0a<state>terminated</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  355. 15:15:02.455712 IP (tos 0x30, ttl 64, id 40208, offset 0, flags [none], proto UDP (17), length 494)
  356. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 466
  357. SIP/2.0 200 OK
  358. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK6d1093a4;rport=5060
  359. From: <sip:[email protected]>;tag=as624a00cb
  360. To: <sip:[email protected]>;tag=750432846
  361. CSeq: 115 NOTIFY
  362. Contact: <sip:[email protected]:59066>
  363. Supported: replaces, path, timer
  364. User-Agent: Grandstream GXP1628 1.0.4.17
  365. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  366. Content-Length: 0
  367.  
  368.  
  369. 15:15:07.586186 IP (tos 0x60, ttl 64, id 52332, offset 0, flags [none], proto UDP (17), length 584)
  370. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 556
  371. OPTIONS sip:[email protected]:59066 SIP/2.0
  372. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK3fe28d93
  373. Max-Forwards: 70
  374. From: "Unknown" <sip:[email protected]>;tag=as49db7554
  375. To: <sip:[email protected]:59066>
  376. Contact: <sip:[email protected]:5060>
  377. Call-ID: [email protected]:5060
  378. CSeq: 102 OPTIONS
  379. User-Agent: FPBX-13.0.197(13.23.1)
  380. Date: Mon, 12 Aug 2019 19:15:07 GMT
  381. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  382. Supported: replaces, timer
  383. Content-Length: 0
  384.  
  385.  
  386. 15:15:07.593408 IP (tos 0x30, ttl 64, id 40209, offset 0, flags [none], proto UDP (17), length 481)
  387. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 453
  388. SIP/2.0 200 OK
  389. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK3fe28d93
  390. From: "Unknown" <sip:[email protected]>;tag=as49db7554
  391. To: <sip:[email protected]:59066>;tag=16080809
  392. Call-ID: [email protected]:5060
  393. CSeq: 102 OPTIONS
  394. Supported: replaces, path, timer
  395. User-Agent: Grandstream GXP1628 1.0.4.17
  396. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  397. Content-Length: 0
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