[Spce-user] Running CE behind an SBC

[Daniel Grotti]

Hi Nerijus,
it would be nice if you could share the full sip trace, in order to see 
also INVITE going from proxy->sems->lb->SBC

Thanks,


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On 1/10/19 12:33 PM, Nerijus Barauskas wrote:
> Hi,
>
> I have a CE mr6.5.2 running inside a private network. At the network 
> edge we have an SBC (IP YYY.YYY.YYY.YYY) which proxies the traffic 
> between the public network and the CE server.
>
> Phones (IP XXX.XXX.XXX.XXX) register via the SBC, which inserts a path 
> header and forwards to CE.
>
> Phones can make outound calls, but on inbound calls, CE ignores the 
> path and tries to send the call difrectly to the phone's IP 
> (XXX.XXX.XXX.XXX) present in the Contact.
>
> What appears to be happening is that the proxy is using the path to 
> send the request to the load balancer, but the rest of the path is 
> being ignored.
>
> Any hints appreciated.
>
> Below is the outbput of proxy ul show for the phone:
>
> # ngcp-kamctl proxy ul showphonetest at test.mydomain.com
> {
>   "AoR":"phonetest at test.mydomain.com",
>   "Contacts": [
>     {
>       "Contact": {
> "Address":"sip:phonetest at XXX.XXX.XXX.XXX:7477;transport=UDP;rinstance=0478b7f3dd34e980",
>         "Expires": 388,
>         "Q": -1,
>         "Call-ID": "GGGGdiKBxQABNklNSjpyiw..",
>         "CSeq": 2,
>         "User-Agent": "Zoiper rv2.9.2",
>         "Received": "[not set]",
>         "Path": 
> "<sip:lb at 127.0.0.1;lr;socket=sip:ZZZ.ZZZ.ZZZ.ZZZ:5060>,<sip:YYY.YYY.YYY.YYY;lr;received=sip:XXX.XXX.XXX.XXX:7477>",
>         "State": "CS_SYNC",
>         "Flags": 0,
>         "CFlags": 0,
>         "Socket": "udp:127.0.0.1:5062",
>         "Methods": 975,
>         "Ruid": "uloc-5c35f1ac-1103-aa",
>         "Instance": "[not set]",
>         "Reg-Id": 0,
>         "Server-Id": 0,
>         "Tcpconn-Id": -1,
>         "Keepalive": 0,
>         "Last-Keepalive": 1547118521,
>         "Last-Modified": 1547118521
>       }
>     }
>   ]
> }
>
>
> Here is the REGISTER packet:
>
> 2019/01/10 11:08:41.546039 YYY.YYY.YYY.YYY:5060 -> ZZZ.ZZZ.ZZZ.ZZZ:5060
> REGISTERsip:test.mydomain.com;transport=UDP  SIP/2.0
> Via: SIP/2.0/UDP 
> YYY.YYY.YYY.YYY;branch=z9hG4bKf8ec.1814ce53196f6e4039f3e2c7f94221dc.0
> Via: SIP/2.0/UDP 
> 100.115.92.2:41451;received=XXX.XXX.XXX.XXX;branch=z9hG4bK-524287-1---c067471c3487d2b7;rport=7477
> Max-Forwards: 69
> Contact:<sip:phonetest at XXX.XXX.XXX.XXX:7477;transport=UDP;rinstance=0478b7f3dd34e980> 
>
> To:<sip:phonetest at test.mydomain.com;transport=UDP>
> From:<sip:phonetest at test.mydomain.com;transport=UDP>;tag=40d2244b
> Call-ID: GGGGdiKBxQABNklNSjpyiw..
> CSeq: 1 REGISTER
> Expires: 60
> Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, 
> INFO, SUBSCRIBE
> User-Agent: Zoiper rv2.9.2
> Allow-Events: presence, kpml, talk
> Content-Length: 0
> Supported: path
> Path:<sip:YYY.YYY.YYY.YYY;lr;received=sip:XXX.XXX.XXX.XXX:7477>
>
> Kind Regards,
> Nerijus Barauskas
>
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