February 2018 - sr-users

Info: Markus Monka replacing Marcus Hunger in management group
by Daniel-Constantin Mierla 07 Feb '18

07 Feb '18

Hello, Markus Monka has just replaced Marcus Hunger in Kamailio project management group. Marcus (still at sipgate) has moved to work more on frontend applications than backend, no longer interacting with Kamailio project. Markus Monka has managed the VoIP operations at sipgate for more than 15 years, helping the project over the years with various resources, mainly in respect of organizing events and testing infrastructure, sipgate being one of the oldest VoIP services using Kamailio (since first releases of SER). The change is reflected now on the website: * https://www.kamailio.org/w/management/ Warm welcome to Markus and many thanks to both of them for what they did so far for Kamailio project! Cheers, Daniel -- Daniel-Constantin Mierla www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio Advanced Training - March 5-7, 2018, Berlin - www.asipto.com Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com

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Info: Kamailio project administration updates
by Daniel-Constantin Mierla 07 Feb '18

07 Feb '18

Hello, after several discussions at some of the past IRC devel meetings, finally we started to build a team to be involved more actively in the administration of Kamailio. The project has grown steadily, not only in terms of code, but also packaging, continuous integration, social networking interactions as well as participation to events world wide. For a better coordination and ability to handle related tasks, I invited the most active developers and community members to join so called Kamailio Administration Team, the initial details about it are published as part of management page on kamailio.org: * https://www.kamailio.org/w/management/ Some more details about its rules and purpose: * https://www.kamailio.org/w/kadmin/ It will still take some time to get it properly rolling, more or less now looking to see if the community has suggestions/improvements on what can be done in these aspects. I wrote to all mailing lists for the initial announcement, but you can just reply to sr-users, if you are subscribed there, otherwise it's fine to write back to any of the lists. Cheers, Daniel -- Daniel-Constantin Mierla www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio Advanced Training - March 5-7, 2018, Berlin - www.asipto.com Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com

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Re: [SR-Users] Contact and Record-Route are using Private IP Address- is this correct?
by Ammar Tinawi 07 Feb '18

07 Feb '18

Is it mandatory to have an interface with public ip in order to overcome NAT problems ?

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Issue with Socket selection on Forwarding ACK message
by Thomas Carvello 06 Feb '18

06 Feb '18

Hello, i have an issue with my Kamailio 4.1.9 configuration. This configuration is multi-homed, we have*two network* interfaces, one on a private network and on the public Internet. Kamailio is configured to listen on port 5060 and 5066 on both interfaces. We register two users Alice and Bob on the public Internet using port 5066. Both users are behind a NAT and we capture the SIP exchange on the proxy server. We have set the parameter mhomed=1 When Alice calls Bob, we have Alice Proxy Bob src=5063 dst=5066 INVITE ------------------> src=5066 ------ INVITE ---------------> dst=5060 dst=5066 <------- 200 OK -------------- src=5060 dst=5063 <------- 200 OK --------- src=5066 src=5063 dst=5066 -------- ACK -----------> *src=5060 (blocked by NAT)* ------ ACK-----x dst=5060 The ACK packet gets relayed with the wrong source port. Then the NAT rejects the packet and the call cannot be established. For some reason, when Bob calls Alice, the call is correctly established. Could it be because Bob happend to use 5060 as local port? Also, if we set nhomed=0 it works BUT we are not sure that multi homed is handled correctly. I was wondering if you have encounter this issue before? I have investigated the code for selection socket and what is the logic of this selection ? /*How does kamailo knows that it should choose 5066 as src port if the user is registered using port 5066 instead of 5066?* / Thank you for your time. Thomas

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rtpproxy - no media connection
by Steve 05 Feb '18

05 Feb '18

Dear sr-users, I am trying to set up a simple Kamailio server with rtpproxy on the same host computer, behind a NAT router. “Run your own Skype-like service” is my set-up guide, but I’m using Kamailio version 5.1 so I modified the config files that came with the download. My problem is that SIP clients can register over the internet via TLS encryption with the server and establish a call session connection, but the ZRTP media connection is not being made. Once the call session connection is made, both clients send out UDP packets to each other, but neither receives them—the media traffic is one way and being dropped somewhere. I’ve tried different rtpproxy start settings. If I start the rtpproxy service with “sudo /etc/init.d/rtpproxy start” then it uses the default “unix:/var/run/rtpproxy/rtpproxy.sock”. I’ve also tried starting with “sudo rtpproxy –l /my_public_ip/ –s udp:localhost:7722” which then asks for either –F (superuser) or –u (user). I’ve tried it both with options “–F” and “-u kamailio kamailio”. All the variations tried so far have the same result as noted above. The server behind the router is in a DMZ zone that bypasses the router firewall. Is there anything in the user-list archives that addresses this issue? Or some likely place to start troubleshooting the problem? Any suggestions would be greatly appreciated. Thanks in advance. Steve --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

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IMS (ng-voice vs github)
by Amar Tinawi 04 Feb '18

04 Feb '18

Hello Dears, can you please tell me what are the differences between the github version of ims modules and the ng-voice modules introduced by Mr Carsten repo ? Thanks in advance

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Fosdem dinner
by Daniel-Constantin Mierla 03 Feb '18

03 Feb '18

Hello, in the past 10 years or so, many of us met at Fosdem conference in Brussels (the edition this year happens during February 3-4) and had a dinner on Saturday evening. I know already couple of people from community that will go there, so the question is if there is any interest to organize again such event. If yes, it will be again on Saturday, on the evening of the 3rd of February. At the past editions, it turned into an all-RTC dinner, but we can consider to have it alone again (eventually with few other invited friends), if there are too many or people want a smaller meeting. Reply this week if you want to join, so we can estimate how many seats we need and have enough time to find a place that can accommodate us. More about Fosdem can be found at: - https://fosdem.org There is a devroom on Sunday with topics covering real time communications. I will have a presentation there. Cheers, Daniel -- Daniel-Constantin Mierla www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio Advanced Training - March 5-7, 2018, Berlin - www.asipto.com Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com

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SDP Rewrite issues
by Steven Meyer 02 Feb '18

02 Feb '18

Our topology is: Client <> Client Router <> Internet <> Firewall (NAT) <> Kamailio <> FS Unfortunately, when enabling SDP Rewrite: fix_nated_sdp, 0x08, it rewrites packets to the firewall external IP, not the client router external IP. Right now we have to do a local NATed IP on each phone.

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Routing based on A and B numbers
by Grant Bagdasarian 02 Feb '18

02 Feb '18

Hi, Which module would be best suited for routing calls based on A and B numbers? We're currently using the LCR module, with some additional htables to add this functionality, but I was wondering if there is a module which does exactly this? Or perhaps a combination of modules? Regards, Grant Bagdasarian Senior Developer +31765727054<tel:+31765727054> cm.com<https://cm.com> [cid:image001.png@01D39C36.945A76C0]

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Distributed Registrations.
by Володимир Іванець 02 Feb '18

02 Feb '18

Hello! Yesterday I read email conversation "Distributed Presence between Multiple Kamailios" where it was suggested to use Presence module with new dmq parameter. So was wondering if someone was thinking about approach to share registrations between multiple Kamailio servers without using database? Thanks!

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