On Wed, 24 Jun 2020 at 13:36, Pavithra Mohanraja <pavimohan3004@gmail.com> wrote:

Hi Supreeth,

I am getting the below error

ms_usrloc_pcscf [/usr/lib/x86_64-linux-gnu/kamailio/modules/ims_usrloc_pcscf.so]
0(455) DEBUG: ims_registrar_pcscf [ims_registrar_pcscf_mod.c:264]: mod_init(): Successfully bound to PCSCF Usrloc module
0(455) DEBUG: <core> [core/sr_module.c:632]: find_mod_export_record(): found export of <bind_ims_ipsec_pcscf> in module ims_ipsec_pcscf [/usr/lib/x86_64-linux-gnu/kamailio/modules/ims_ipsec_pcscf.so]
0(455) ERROR: ims_ipsec_pcscf [cmd.c:85]: bind_ipsec_pcscf(): configuration error - trying to bind to ipsec pscscf module before being initialized
0(455) ERROR: <core> [core/sr_module.c:849]: init_mod(): Error while initializing module ims_registrar_pcscf (/usr/lib/x86_64-linux-gnu/kamailio/modules/ims_registrar_pcscf.so)
ERROR: error while initializing modules
0(455) ERROR: ims_ipsec_pcscf [ims_ipsec_pcscf_mod.c:305]: mod_destroy(): Error destroying spi generator
0(455) ERROR: ims_ipsec_pcscf [ims_ipsec_pcscf_mod.c:309]: mod_destroy(): Error destroying port generator
0(455) DEBUG: tm [t_funcs.c:84]: tm_shutdown(): start
0(455) DEBUG: tm [t_funcs.c:87]: tm_shutdown(): emptying hash table
0(455) DEBUG: tm [t_funcs.c:89]: tm_shutdown(): removing semaphores
0(455) DEBUG: tm [t_funcs.c:91]: tm_shutdown(): destroying tmcb lists

Kindly help

On Wed, Jun 24, 2020 at 5:03 PM supreeth herle <herlesupreeth@gmail.com> wrote:
There is no other IPSec configuration needed apart from running Kamailio P-CSCF and UE sending a SIP Register with Security-Client information for IPSec creation. Kamailio IMS IPSec module creates IPSec tunnels using Netlink library.

Best Regards,
Supreeth

On Wed, 24 Jun 2020 at 13:29, Pavithra Mohanraja <pavimohan3004@gmail.com> wrote:
Hi ,

Could you please tell how to configure ipsec (general configuration not related to kamailio).

Thanks,
Pavithra

On Wed, Jun 24, 2020 at 2:12 PM supreeth herle <herlesupreeth@gmail.com> wrote:
reason=404 (Not Found - destination user not found on this S-CSCF)]

Please check your IMPU for the IMS user in the IMS HSS (e.g. FHoSS or any other HSS you are using to enter IMS user details). SCSCF is not able to find a registered user with that IMPU (i am assuming that you are getting this response while calling)

Increase the debug level on S-CSCF and check out which IMPU is being referred by SCSCF

Best Regards,
Supreeth

On Wed, 24 Jun 2020 at 10:26, Pavithra Mohanraja <pavimohan3004@gmail.com> wrote:
Hi,

I am facing below error in kamailio-ims 5.3.4 version.

reason=404 (Not Found - destination user not found on this S-CSCF)]

could you please help me how should i proceed with and where the registration details will be stored in kamailio ims.

It fails at this line in kamailio.cfg file in scscf .

route[FINAL_TERM] {
if (lookup("location")) {
if (uri==myself) {
if (!t_newtran()) {
sl_reply_error();
exit;
}
xlog("Destination Not Found ----\n");
t_reply("404","Not Found - destination user not found on this S-CSCF");
exit;
}

here lookup(location) means what it means. Could you please help me

Thanks,
Pavithra

On Thu, May 14, 2020 at 9:59 PM supreeth herle <herlesupreeth@gmail.com> wrote:
Hello Pavithra,

I have written a guide for how to integrate an IMS using Kamailio with open5gs EPC, here is the link https://open5gs.org/open5gs/docs/tutorial/02-VoLTE-setup/. You can find steps to setup rtpengine in that guide.

Regarding requirement of rtpengine, its mandatory if you want to use the scripts in that example folder without modification. Also, read the READE of sipwise/rtpengine github repo, its very informative (in a gist rtpengine offer much more feature than rtpproxy)

why can't we have sip client to sip client rtps flowing like how it is happening without NAT.

For this, i would definitely suggest to read about SIP working. This is a perfect link https://github.com/onmyway133/blog/issues/284 which offers extensive material (short and very interesting to read with examples) related to SIP.

Best Regards,
Supreeth

On Thu, 14 May 2020 at 17:51, Pavithra Mohanraja <pavimohan3004@gmail.com> wrote:
Hi ,

I didn't configure rtpengine ..instead of that only I used rrpproxy..will it not work?

If not please tell me how to configure rtpengine and also tell me if it is really madatory .. why can't we have sip client to sip client rtps flowing like how it is happening without NAT.

That's my doubt ..please clarify ..

Thanks.

On Thu, May 14, 2020, 8:57 PM supreeth herle <herlesupreeth@gmail.com> wrote:
HI,

Hold on a moment,

10.40.10.3 - pcscf in port 4060 (pcscf with NAT enabled in pcscf.cfg (!#define WITH_NAT) and configured rtpproxy)
10.40.10.12 - icscf in port 4070
10.40.10.5 - scscf in port 4080
10.40.10.30 - hss

So i assume you are using the examples provided in the ims folder of kamailio repo right? Isn't it using RTPEngine and not RTPProxy? Or have you modified the P-CSCF configuration to work with RTPProxy?

Best regards,
Supreeth

On Thu, 14 May 2020 at 16:39, Pavithra Mohanraja <pavimohan3004@gmail.com> wrote:
Hi ,
I have attached working rtp pcap file. But it is getting reverted back to me .

As you said , i have tried restarting rtpproxy several times. but it didnt work .

On Thu, May 14, 2020 at 7:11 PM supreeth herle <herlesupreeth@gmail.com> wrote:
Thanks for the pcap. Sorry, to ask this but can you also send pcap of scenario where you see RTP packets?

Also, did you restart the rtpproxy after altering the /etc/default/rtpproxy ?

i.e.

$ systemctl restart rtpproxy

Best Regards,
Supreeth

On Thu, 14 May 2020 at 14:51, Pavithra Mohanraja <pavimohan3004@gmail.com> wrote:
Hi Supreeth,
I have attached pcap files . kindly check and let me know.
filter of rtp packets and check.

filter : sip || rtp

On Thu, May 14, 2020 at 5:15 PM supreeth herle <herlesupreeth@gmail.com> wrote:
Hi Pavithra,

Thanks for the clarification. Can you please attach a pcap of the call where you are not seeing the RTP packets? And, btw is the call getting dropped or something in that scenario?

Regards,
Supreeth

On Thu, 14 May 2020 at 13:34, Pavithra Mohanraja <pavimohan3004@gmail.com> wrote:
Hi Supreeth,

I have kamailio ims installed in 4 vms inside openstack.

10.40.10.3 - pcscf in port 4060 (pcscf with NAT enabled in pcscf.cfg (!#define WITH_NAT) and configured rtpproxy)
10.40.10.12 - icscf in port 4070
10.40.10.5 - scscf in port 4080
10.40.10.30 - hss

so all these vms are running in same subnet.
I have a floating ip associated to pcscf.
Now I have two zoiper clients outside openstack
zoiper1 - 10.0.2.15 (NAT Enabled Network adaptor)
zoiper2 - 10.0.2.15

when i am making a call from zoiper1 to zoiper2, call is going properly . SIP messages are coming properly in wireshark packets.
when i filter for RTP packets in wireshark, it is not coming.

when i have the zoiper clients inside openstack itself ,i can able to see RTP Packets in wireshark between two sip clients without any NAT related configurations done.

Kindly help me.
Thanks.

On Thu, May 14, 2020 at 4:49 PM supreeth herle <herlesupreeth@gmail.com> wrote:
Can you explain some more when you mean by "RTP alone is not coming."? And, how are you checking/verifying that?

Regards,
Supreeth

On Thu, 14 May 2020 at 13:12, Pavithra Mohanraja <pavimohan3004@gmail.com> wrote:
Hi ,

Yes I have configured as you mentioned only . In my pcscf only i have rtpproxy also configured.
Floating IP i have given in listen address also as
listen = 10.40.10.3:4060 advertise 10.45.4.22:4060

10.40.10.3 - private ip
10.45.4.22 - floating ip
Still RTP alone is not coming.

Is it the only way of configuring NAT ?

Thanks.

On Thu, May 14, 2020 at 4:37 PM supreeth herle <herlesupreeth@gmail.com> wrote:
Hello Pavithra,

Have you tried advertising the floating IP of the VM running RTPProxy as follows?

Edit /etc/default/rtpproxy file as follows:

# Additional options that are passed to the daemon.
EXTRA_OPTS="-l 172.24.15.30 -d DBUG:LOG_LOCAL0"

here, "-l <PUBLIC_IP>"

Hope it helps.

Regards,
Supreeth

On Thu, 14 May 2020 at 13:01, Pavithra Mohanraja <pavimohan3004@gmail.com> wrote:
Hi ,

Could anybody please give me the approach how to configure NAT in kamailio IMS.

I have installed kamailio IMS in openstack environment which has private ips for all four vms (each component in one vm). pcscf has one floating IP attached. I have enabled "WITH_NAT" and configured rtpproxy .

when i make a call from outside of openstack using 2 zoiper clients with outbound proxy keeping floating ip of pcscf, I am getting 200 ok with all SIP packets correctly flowing but there is no RTP Packet.

When i try the same within openstack environment without using public ip, I am getting RTP Packets.

Kindly tell me the procedure of NAT Enablement or do i need to do anything other than this.

Kindly help because i am stuck with this for long time.

Thanks.
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