Hi,
I made some interesting observations regarding this.
Remind the following scenario:
asterisk registers number A towards provider A (sipgate.de)
asterisk also registers another number towards provider B (tel.t-online.de)
I make a test call from a remote location, which is registered as well
towards provider B.
What happens on the asterisk?
have a look below.
It seems that the registration to number B of provider B, which sends
the incoming call to asterisk, brings asterisk out of order, because the
ACKs are sent to the wrong port.
after some time the ACK of provider B reaches asterisk on the right port
(55060), but that is maybe by accident. when the trunk to provider B is
disabled it works fine immediately.
That explains, why calls to sipgate.de are cancelled after about 30s.
But can someone explain that? Is it an issue of provider B (which I
can't believe, it is one of the biggest here in germany)?
217.10.79.9:5060 10.17.46.99:55060
217.0.23.36:5060 10.17.46.99:65319 10.17.46.99:505
──────────┬───────── ──────────┬─────────
──────────┬───────── ──────────┬───────── ──────────┬──────
▒ │ INVITE (SDP) │
│ │ │
▒ 18:26:47.695820 │ ──────────────────────────>
│ │ │ │
▒ +0.001354 │ 100 Trying │ │
│ │
▒ 18:26:47.697174 │ <──────────────────────────
│ │ │ │
▒ +0.024128 │ 200 OK (SDP) │
│ │ │
▒ 18:26:47.721302 │ <──────────────────────────
│ │ │ │
▒ +0.418916 │ INVITE (SDP) │
│ │ │
▒ 18:26:48.140218 │ ────────────────────────>>>
│ │ │ │
▒ +0.000464 │ 200 OK (SDP) │
│ │ │
▒ 18:26:48.140682 │ <<<────────────────────────
│ │ │ │
▒ +0.047604 │ │ │ ACK
│ │
▒ 18:26:48.188286 │ │ │
──────────────────────────> │ │
▒ +0.033199 │ 200 OK (SDP) │
│ │ │
▒ 18:26:48.221485 │ <<<────────────────────────
│ │ │ │
▒ +0.413234 │ │ │ ACK
│ │
▒ 18:26:48.634719 │ │ │
──────────────────────────> │ │
▒ +0.073871 │ │ │ ACK
│ │
▒ 18:26:48.708590 │ │ │
──────────────────────────> │ │
▒ +1.513110 │ 200 OK (SDP) │
│ │ │
▒ 18:26:50.221700 │ <<<────────────────────────
│ │ │ │
▒ +0.478899 │ │ │ ACK
│ │
▒ 18:26:50.700599 │ │ │
──────────────────────────> │ │
▒ +3.520824 │ 200 OK (SDP) │
│ │ │
▒ 18:26:54.221423 │ <<<────────────────────────
│ │ │ │
▒ +0.524939 │ │ │ ACK
│ │
▒ 18:26:54.746362 │ │ │
──────────────────────────> │ │
▒ +3.475120 │ 200 OK (SDP) │
│ │ │
▒ 18:26:58.221482 │ <<<────────────────────────
│ │ │ │
▒ +0.482321 │ │ │ ACK
│ │
▒ 18:26:58.703803 │ │ │
──────────────────────────> │ │
▒ +3.519206 │ 200 OK (SDP) │
│ │ │
▒ 18:27:02.223009 │ <<<────────────────────────
│ │ │ │
▒ +0.481228 │ │ │ ACK
│ │
▒ 18:27:02.704237 │ │ │
──────────────────────────> │ │
▒ +3.518524 │ 200 OK (SDP) │
│ │ │
▒ 18:27:06.222761 │ <<<────────────────────────
│ │ │ │
│ +0.483722 │ │ │ ACK
│ │
│ 18:27:06.706483 │ │ │
──────────────────────────> │ │
│ +3.516816 │ 200 OK (SDP) │
│ │ │
│ 18:27:10.223299 │ <<<────────────────────────
│ │ │ │
│ +0.484398 │ │ ACK │
│ │
│ 18:27:10.707697 │ │
<────────────────────────── │ │ │
│ +59.790625 │ │ │
BYE │
│ 18:28:10.498322 │ │ │
────────────────────────────────────────────────────────> │
Am 15.10.2016 um 15:39 schrieb Andre Gronwald:
ok, now it is getting weird...
actually i don't see any firewall issues, but i am not able to get a
call from outside to my sipgate account. in asterisk nothing is
visible, core set verbose is activated.
sngrep (on my asterisk server) shows me indeed the invite from sipgate!?
What I see via sngrep is the following options-flow:
192.168.3.50:55060 -> 217.10.79.9:5060
217.10.79.9:5060 -> 192.168.3.50:48757 (200 OK)
shouldn't sipgate answer on the same port that the communication
initiated??? in this case 55060?
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