I’m not sure about the route or record-route headers. Below is a snippet of the communication between the freepbx server and client machine
maclap is client going to freepbx
mtvmastrx01 is freepbx server
– begin –
18:26:57.730532 IP (tos 0x0, ttl 64, id 52094, offset 0, flags [none], proto UDP (17), length 597)
maclap.mydomain.38641 > mtvmastrx01.mydomain.sip: [udp sum ok] SIP, length: 569
REGISTER sip:mydomain SIP/2.0
Via: SIP/2.0/UDP 192.168.1.27:38641;branch=z9hG4bK-d8754z-8f5d761a1eb12631-1—d8754z-
Max-Forwards: 70
Contact: sip:[email protected]:38641;rinstance=f3acff830e397a66;transport=udp
To: "PBXUser 100"sip:100@mydomain
From: "PBXUser 100"sip:100@mydomain;tag=cf63447e
Call-ID: MDg0Mjk3NTk2MGQ0NTY3MjFkNWEzYjMzYTNjMDZlM2M.
CSeq: 30 REGISTER
Expires: 3600
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO
User-Agent: Bria 3 release 3.2.2 stamp 63092
Content-Length: 0
0x0000: 5245 4749 5354 4552 2073 6970 3a73 6970
0x0010: 2e6d 7465 6b6b 612e 636f 6d20 5349 502f
0x0020: 322e 300d 0a56 6961 3a20 5349 502f 322e
0x0030: 302f 5544 5020 3133 322e 3835 2e31 2e32
0x0040: 373a 3338 3634 313b 6272 616e 6368 3d7a
0x0050: 3968 4734 624b 2d64 3837 3534 7a2d 3866
0x0060: 3564 3736 3161 3165 6231 3236 3331 2d31
0x0070: 2d2d 2d64 3837 3534 7a2d 0d0a 4d61 782d
0x0080: 466f 7277 6172 6473 3a20 3730 0d0a 436f
0x0090: 6e74 6163 743a 203c 7369 703a 3130 3040
0x00a0: 3133 322e 3835 2e31 2e32 373a 3338 3634
0x00b0: 313b 7269 6e73 7461 6e63 653d 6633 6163
0x00c0: 6666 3833 3065 3339 3761 3636 3b74 7261
0x00d0: 6e73 706f 7274 3d75 6470 3e0d 0a54 6f3a
0x00e0: 2022 4e61 7468 616e 6965 6c20 4461 7669
0x00f0: 7322 3c73 6970 3a31 3030 4073 6970 2e6d
0x0100: 7465 6b6b 612e 636f 6d3e 0d0a 4672 6f6d
0x0110: 3a20 224e 6174 6861 6e69 656c 2044 6176
0x0120: 6973 223c 7369 703a 3130 3040 7369 702e
0x0130: 6d74 656b 6b61 2e63 6f6d 3e3b 7461 673d
0x0140: 6366 3633 3434 3765 0d0a 4361 6c6c 2d49
0x0150: 443a 204d 4467 304d 6a6b 334e 546b 324d
0x0160: 4751 304e 5459 334d 6a46 6b4e 5745 7a59
0x0170: 6a4d 7a59 544e 6a4d 445a 6c4d 324d 2e0d
0x0180: 0a43 5365 713a 2033 3020 5245 4749 5354
0x0190: 4552 0d0a 4578 7069 7265 733a 2033 3630
0x01a0: 300d 0a41 6c6c 6f77 3a20 494e 5649 5445
0x01b0: 2c20 4143 4b2c 2043 414e 4345 4c2c 204f
0x01c0: 5054 494f 4e53 2c20 4259 452c 2052 4546
0x01d0: 4552 2c20 4e4f 5449 4659 2c20 4d45 5353
0x01e0: 4147 452c 2053 5542 5343 5249 4245 2c20
0x01f0: 494e 464f 0d0a 5573 6572 2d41 6765 6e74
0x0200: 3a20 4272 6961 2033 2072 656c 6561 7365
0x0210: 2033 2e32 2e32 2073 7461 6d70 2036 3330
0x0220: 3932 0d0a 436f 6e74 656e 742d 4c65 6e67
0x0230: 7468 3a20 300d 0a0d 0a
18:26:57.735155 IP (tos 0x60, ttl 127, id 21244, offset 0, flags [none], proto UDP (17), length 513)
mtvmastrx01.mydomain.sip > maclap.mydomain.10041: [udp sum ok] SIP, length: 485
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.1.27:38641;branch=z9hG4bK-d8754z-8f5d761a1eb12631-1—d8754z-;received=192.168.54.1;rport=33991
From: "PBXUser 100"sip:100@mydomain;tag=cf63447e
To: "PBXUser 100"sip:100@mydomain
Call-ID: MDg0Mjk3NTk2MGQ0NTY3MjFkNWEzYjMzYTNjMDZlM2M.
CSeq: 30 REGISTER
Server: FPBX-2.10.0(1.8.8.0)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Supported: replaces, timer
Content-Length: 0
0x0000: 5349 502f 322e 3020 3130 3020 5472 7969
0x0010: 6e67 0d0a 5669 613a 2053 4950 2f32 2e30
0x0020: 2f55 4450 2031 3332 2e38 352e 312e 3237
0x0030: 3a33 3836 3431 3b62 7261 6e63 683d 7a39
0x0040: 6847 3462 4b2d 6438 3735 347a 2d38 6635
0x0050: 6437 3631 6131 6562 3132 3633 312d 312d
0x0060: 2d2d 6438 3735 347a 2d3b 7265 6365 6976
0x0070: 6564 3d31 3332 2e38 352e 3534 2e31 3b72
0x0080: 706f 7274 3d33 3339 3931 0d0a 4672 6f6d
0x0090: 3a20 224e 6174 6861 6e69 656c 2044 6176
0x00a0: 6973 223c 7369 703a 3130 3040 7369 702e
0x00b0: 6d74 656b 6b61 2e63 6f6d 3e3b 7461 673d
0x00c0: 6366 3633 3434 3765 0d0a 546f 3a20 224e
0x00d0: 6174 6861 6e69 656c 2044 6176 6973 223c
0x00e0: 7369 703a 3130 3040 7369 702e 6d74 656b
0x00f0: 6b61 2e63 6f6d 3e0d 0a43 616c 6c2d 4944
0x0100: 3a20 4d44 6730 4d6a 6b33 4e54 6b32 4d47
0x0110: 5130 4e54 5933 4d6a 466b 4e57 457a 596a
0x0120: 4d7a 5954 4e6a 4d44 5a6c 4d32 4d2e 0d0a
0x0130: 4353 6571 3a20 3330 2052 4547 4953 5445
0x0140: 520d 0a53 6572 7665 723a 2046 5042 582d
0x0150: 322e 3130 2e30 2831 2e38 2e38 2e30 290d
0x0160: 0a41 6c6c 6f77 3a20 494e 5649 5445 2c20
0x0170: 4143 4b2c 2043 414e 4345 4c2c 204f 5054
0x0180: 494f 4e53 2c20 4259 452c 2052 4546 4552
0x0190: 2c20 5355 4253 4352 4942 452c 204e 4f54
0x01a0: 4946 592c 2049 4e46 4f2c 2050 5542 4c49
0x01b0: 5348 0d0a 5375 7070 6f72 7465 643a 2072
0x01c0: 6570 6c61 6365 732c 2074 696d 6572 0d0a
0x01d0: 436f 6e74 656e 742d 4c65 6e67 7468 3a20
0x01e0: 300d 0a0d 0a
18:26:57.735240 IP (tos 0x0, ttl 64, id 11264, offset 0, flags [none], proto ICMP (1), length 56)
maclap.mydomain > mtvmastrx01.mydomain: ICMP maclap.mydomain udp port 10041 unreachable, length 36
IP (tos 0x60, ttl 127, id 21244, offset 0, flags [none], proto UDP (17), length 513)
mtvmastrx01.mydomain.sip > maclap.mydomain.10041: [no cksum] SIP, length: 485
[|sip]
18:26:57.735351 IP (tos 0x60, ttl 127, id 6957, offset 0, flags [none], proto UDP (17), length 610)
mtvmastrx01.mydomain.sip > maclap.mydomain.10041: [udp sum ok] SIP, length: 582
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.1.27:38641;branch=z9hG4bK-d8754z-8f5d761a1eb12631-1—d8754z-;received=192.168.54.1;rport=33991
From: "PBXUser 100"sip:100@mydomain;tag=cf63447e
To: "PBXUser 100"sip:100@mydomain;tag=as050b8e8d
Call-ID: MDg0Mjk3NTk2MGQ0NTY3MjFkNWEzYjMzYTNjMDZlM2M.
CSeq: 30 REGISTER
Server: FPBX-2.10.0(1.8.8.0)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Supported: replaces, timer
WWW-Authenticate: Digest algorithm=MD5, realm=“asterisk”, nonce="6337d2fb"
Content-Length: 0
0x0000: 5349 502f 322e 3020 3430 3120 556e 6175
0x0010: 7468 6f72 697a 6564 0d0a 5669 613a 2053
0x0020: 4950 2f32 2e30 2f55 4450 2031 3332 2e38
0x0030: 352e 312e 3237 3a33 3836 3431 3b62 7261
0x0040: 6e63 683d 7a39 6847 3462 4b2d 6438 3735
0x0050: 347a 2d38 6635 6437 3631 6131 6562 3132
0x0060: 3633 312d 312d 2d2d 6438 3735 347a 2d3b
0x0070: 7265 6365 6976 6564 3d31 3332 2e38 352e
0x0080: 3534 2e31 3b72 706f 7274 3d33 3339 3931
0x0090: 0d0a 4672 6f6d 3a20 224e 6174 6861 6e69
0x00a0: 656c 2044 6176 6973 223c 7369 703a 3130
0x00b0: 3040 7369 702e 6d74 656b 6b61 2e63 6f6d
0x00c0: 3e3b 7461 673d 6366 3633 3434 3765 0d0a
0x00d0: 546f 3a20 224e 6174 6861 6e69 656c 2044
0x00e0: 6176 6973 223c 7369 703a 3130 3040 7369
0x00f0: 702e 6d74 656b 6b61 2e63 6f6d 3e3b 7461
0x0100: 673d 6173 3035 3062 3865 3864 0d0a 4361
0x0110: 6c6c 2d49 443a 204d 4467 304d 6a6b 334e
0x0120: 546b 324d 4751 304e 5459 334d 6a46 6b4e
0x0130: 5745 7a59 6a4d 7a59 544e 6a4d 445a 6c4d
0x0140: 324d 2e0d 0a43 5365 713a 2033 3020 5245
0x0150: 4749 5354 4552 0d0a 5365 7276 6572 3a20
0x0160: 4650 4258 2d32 2e31 302e 3028 312e 382e
0x0170: 382e 3029 0d0a 416c 6c6f 773a 2049 4e56
0x0180: 4954 452c 2041 434b 2c20 4341 4e43 454c
0x0190: 2c20 4f50 5449 4f4e 532c 2042 5945 2c20
0x01a0: 5245 4645 522c 2053 5542 5343 5249 4245
0x01b0: 2c20 4e4f 5449 4659 2c20 494e 464f 2c20
0x01c0: 5055 424c 4953 480d 0a53 7570 706f 7274
0x01d0: 6564 3a20 7265 706c 6163 6573 2c20 7469
0x01e0: 6d65 720d 0a57 5757 2d41 7574 6865 6e74
0x01f0: 6963 6174 653a 2044 6967 6573 7420 616c
0x0200: 676f 7269 7468 6d3d 4d44 352c 2072 6561
0x0210: 6c6d 3d22 6173 7465 7269 736b 222c 206e
0x0220: 6f6e 6365 3d22 3633 3337 6432 6662 220d
0x0230: 0a43 6f6e 7465 6e74 2d4c 656e 6774 683a
0x0240: 2030 0d0a 0d0a
18:26:57.735399 IP (tos 0x0, ttl 64, id 34330, offset 0, flags [none], proto ICMP (1), length 56)
maclap.mydomain > mtvmastrx01.mydomain: ICMP maclap.mydomain udp port 10041 unreachable, length 36
IP (tos 0x60, ttl 127, id 6957, offset 0, flags [none], proto UDP (17), length 610)
mtvmastrx01.mydomain.sip > maclap.mydomain.10041: [no cksum] SIP, length: 582
[|sip]