Re: Why won't this work

Fred Posner via sr-users <[email protected]>
Newsgroups gmane.comp.voip.ser
Message-ID <[email protected]>
> On Jun 4, 2025, at 11:59 AM, Fernando Lopes via sr-users <[email protected]> wrote:
> 
> Kamailio isn’t working on my Azure VM, even though it’s set up to use port 5060. The network rules on Azure have both inbound and outbound traffic open for all protocols. I also tried using advertised_address, but that didn’t help either. It looks like no traffic is even hitting Kamailio — none of the routing blocks are triggered.
> 
> 
> Kamailio.cfg
> alias=<PUBLIC-IP>
> listen=udp:10.0.0.4:5060 advertise <PUBLIC-IP>:5060
> listen=tcp:10.0.0.4:5060 advertise <PUBLIC-IP>:5060
> 
> Sip Message:
> 2025/06/04 15:50:37.870679 64.16.250.10:5060 -> 10.0.0.4:5060
> INVITE sip:+351200600020@<PUBLIC-IP>:5060 SIP/2.0
> Record-Route: <sip:64.16.250.10;r2=on;lr;ftag=DpHvv09240egQ>
> Record-Route: <sip:10.255.0.2;r2=on;lr;ftag=DpHvv09240egQ>
> Via: SIP/2.0/UDP 64.16.250.10;branch=z9hG4bKd59a.fb67bf395ea20488a7a5ebf76b9b5685.0
> v:SIP/2.0/UDP 10.239.196.24:6000;received=10.239.196.24;rport=6000;branch=z9hG4bKy9ZvBZcgretvr
> Max-Forwards:48
> f:"+351908020050"<sip:[email protected]>;tag=DpHvv09240egQ
> t:<sip:+351200600020@<PUBLIC-IP>:5060>
> i:122d71bb-4f3d-473f-8853-9137023f1f14
> CSeq:99972326 INVITE
> m:<sip:[email protected]:6000>
> Allow:INVITE,ACK,BYE,CANCEL,OPTIONS,MESSAGE,INFO,UPDATE,REFER,NOTIFY
> k:timer,path
> u:talk,hold,conference,refer
> Privacy:none
> c:application/sdp
> Content-Disposition:session
> l:202
> P-Asserted-Identity:"+351908020050"<sip:[email protected];verstat=No-TN-Validation>
> 
> v=0
> o=Telnyx 1749019739 1749019740 IN IP4 50.114.147.4
> s=Telnyx
> c=IN IP4 50.114.147.4
> t=0 0
> m=audio 32498 RTP/AVP 9
> a=rtpmap:9 G722/8000
> a=sendrecv
> a=rtcp:32499 IN IP4 50.114.147.4
> a=ptime:20

I’d suggest you increase logging as well as make sure that the system is even seeing the traffic. Something like sngrep will let you see that the NIC  is seeing it.

You will then need to confirm nothing is blocking kamailio (ufw,iptables,etc) from seeing the packets. And then, if Kamailio is seeing it, advise of the error and or message.

Fred Posner
Tel: +1 (352) 664-3733
Alt: +1 (224) 334-3733

Contact info at https://fredp.xyz



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