[SR-Users] Problems establishing SIP signaling between MsTeams and Kamailio

Willy Valles Rios willyvalles17 at gmail.com
Sat Jan 9 06:30:56 CET 2021


Dear Kamilio Community,

After doing several reads to our Kamailio configuration, the dispatcher
list is in AP:

URI: sip: sip.pstnhub.microsoft.com; transport = tls
                                         FLAGS: AP
URI: sip: sip2.pstnhub.microsoft.com; transport = tls
                                         FLAGS: AP
URI: sip: sip3.pstnhub.microsoft.com; transport = tls
                                         FLAGS: AP

But in the MS Teams dashboard the SIP OPTIONS STATUS column is WARNING.

In the LOGs sent to OPTIONS, it gives us to understand that with sent to MS
TEAMS:

Jan  8 19:01:40 Kamailio-Server /usr/sbin/kamailio[1444]: INFO: <script>:
Sent out tm request: OPTIONS sip:sip.pstnhub.microsoft.com;transport=tls
SIP/2.0#015#012Via: SIP/2.0/TLS
161.35.44.66:5061;branch=z9hG4bKd25f.2835f676000000000000000000000000.0#015#012To:
<sip:sip.pstnhub.microsoft.com;transport=tls>#015#012From: <sip:
sbc.netvoiceperu.com>;tag=69ae0da9200ed8d142f2e4a69f531080-213e3c71#015#012CSeq:
10 OPTIONS#015#012Call-ID:
07561978687e60d0-1444 at 10.131.245.99#015#012Max-Forwards
<http://07561978687e60d0-1444@10.131.245.99/#015%23012Max-Forwards>:
70#015#012Content-Length: 0#015#012User-Agent: kamailio (5.4.0
(x86_64/linux))
Jan  8 19:01:40 Kamailio-Server /usr/sbin/kamailio[1444]: INFO: <script>:
Sent out tm request: OPTIONS sip:sip2.pstnhub.microsoft.com;transport=tls
SIP/2.0#015#012Via: SIP/2.0/TLS
161.35.44.66:5061;branch=z9hG4bKe25f.b14dc514000000000000000000000000.0#015#012To:
<sip:sip2.pstnhub.microsoft.com;transport=tls>#015#012From: <sip:
sbc.netvoiceperu.com>;tag=69ae0da9200ed8d142f2e4a69f531080-44c3af70#015#012CSeq:
10 OPTIONS#015#012Call-ID:
07561978687e60d1-1444 at 10.131.245.99#015#012Max-Forwards
<http://07561978687e60d1-1444@10.131.245.99/#015%23012Max-Forwards>:
70#015#012Content-Length: 0#015#012User-Agent: kamailio (5.4.0
(x86_64/linux))
Jan  8 19:01:40 Kamailio-Server /usr/sbin/kamailio[1444]: INFO: <script>:
Sent out tm request: OPTIONS sip:sip3.pstnhub.microsoft.com;transport=tls
SIP/2.0#015#012Via: SIP/2.0/TLS
161.35.44.66:5061;branch=z9hG4bKb25f.8442f914000000000000000000000000.0#015#012To:
<sip:sip3.pstnhub.microsoft.com;transport=tls>#015#012From: <sip:
sbc.netvoiceperu.com>;tag=69ae0da9200ed8d142f2e4a69f531080-fa555adb#015#012CSeq:
10 OPTIONS#015#012Call-ID:
07561978687e60d2-1444 at 10.131.245.99#015#012Max-Forwards
<http://07561978687e60d2-1444@10.131.245.99/#015%23012Max-Forwards>:
70#015#012Content-Length: 0#015#012User-Agent: kamailio (5.4.0
(x86_64/linux))
Jan  8 19:01:42 Kamailio-Server journal: Suppressed 103 messages from
/system.slice/kamailio.service

In the kamailio.cfg configuration it is declared:

 listen=tls:161.35.44.66:5061
 listen=tcp:10.131.245.99:5061

modparam ("dispatcher", "list_file", "/etc/kamailio/dispatcher.list")
modparam ("dispatcher", "ds_probing_mode", 1)
modparam ("dispatcher", "ds_ping_interval", 60)

And this fragment was also added:

event_route [tm: local-request] {

         if (is_method ("OPTIONS") && $ ru = ~ "pstnhub.microsoft.com") {
                append_hf ("Contact: <sip: sbc.netvoiceperu.com: 5061;
transport = tls> \ r \ n");
         }
         xlog ("L_INFO", "Sent out tm request: $ mb \ n");
}

There is something additional that has to be declared so that in the MS
Teams panel the SIP OPTIONS STATUS column is shown as ACTIVE and not as
WARNNING, in the MS TEAMS documentation it is a possible problem related to
OPTIONS events.

Saludos Cordiales
-- 
*Willy Valles Rios*
*Unified Communications Specialist*

phone: +51955747343
em at il: willyvalles17 at gmail.com


El sáb, 9 ene 2021 a las 0:27, Willy Valles Rios (<willyvalles17 at gmail.com>)
escribió:

> Dear Kamilio Community,
>
> After doing several reads to our Kamailio configuration, the dispatcher
> list is in AP:
>
> URI: sip: sip.pstnhub.microsoft.com; transport = tls
>                                          FLAGS: AP
> URI: sip: sip2.pstnhub.microsoft.com; transport = tls
>                                          FLAGS: AP
> URI: sip: sip3.pstnhub.microsoft.com; transport = tls
>                                          FLAGS: AP
>
> But in the MS Teams dashboard the SIP OPTIONS STATUS column is WARNING.
>
> In the LOGs sent to OPTIONS, it gives us to understand that with sent to
> MS TEAMS:
>
> Jan  8 19:01:40 Kamailio-Server /usr/sbin/kamailio[1444]: INFO: <script>:
> Sent out tm request: OPTIONS sip:sip.pstnhub.microsoft.com;transport=tls
> SIP/2.0#015#012Via: SIP/2.0/TLS 161.35.44.66:5061;branch=z9hG4bKd25f.2835f676000000000000000000000000.0#015#012To:
> <sip:sip.pstnhub.microsoft.com;transport=tls>#015#012From: <sip:
> sbc.netvoiceperu.com>;tag=69ae0da9200ed8d142f2e4a69f531080-213e3c71#015#012CSeq:
> 10 OPTIONS#015#012Call-ID:
> 07561978687e60d0-1444 at 10.131.245.99#015#012Max-Forwards
> <http://07561978687e60d0-1444@10.131.245.99/#015%23012Max-Forwards>:
> 70#015#012Content-Length: 0#015#012User-Agent: kamailio (5.4.0
> (x86_64/linux))
> Jan  8 19:01:40 Kamailio-Server /usr/sbin/kamailio[1444]: INFO: <script>:
> Sent out tm request: OPTIONS sip:sip2.pstnhub.microsoft.com;transport=tls
> SIP/2.0#015#012Via: SIP/2.0/TLS 161.35.44.66:5061;branch=z9hG4bKe25f.b14dc514000000000000000000000000.0#015#012To:
> <sip:sip2.pstnhub.microsoft.com;transport=tls>#015#012From: <sip:
> sbc.netvoiceperu.com>;tag=69ae0da9200ed8d142f2e4a69f531080-44c3af70#015#012CSeq:
> 10 OPTIONS#015#012Call-ID:
> 07561978687e60d1-1444 at 10.131.245.99#015#012Max-Forwards
> <http://07561978687e60d1-1444@10.131.245.99/#015%23012Max-Forwards>:
> 70#015#012Content-Length: 0#015#012User-Agent: kamailio (5.4.0
> (x86_64/linux))
> Jan  8 19:01:40 Kamailio-Server /usr/sbin/kamailio[1444]: INFO: <script>:
> Sent out tm request: OPTIONS sip:sip3.pstnhub.microsoft.com;transport=tls
> SIP/2.0#015#012Via: SIP/2.0/TLS 161.35.44.66:5061;branch=z9hG4bKb25f.8442f914000000000000000000000000.0#015#012To:
> <sip:sip3.pstnhub.microsoft.com;transport=tls>#015#012From: <sip:
> sbc.netvoiceperu.com>;tag=69ae0da9200ed8d142f2e4a69f531080-fa555adb#015#012CSeq:
> 10 OPTIONS#015#012Call-ID:
> 07561978687e60d2-1444 at 10.131.245.99#015#012Max-Forwards
> <http://07561978687e60d2-1444@10.131.245.99/#015%23012Max-Forwards>:
> 70#015#012Content-Length: 0#015#012User-Agent: kamailio (5.4.0
> (x86_64/linux))
> Jan  8 19:01:42 Kamailio-Server journal: Suppressed 103 messages from
> /system.slice/kamailio.service
>
> In the kamailio.cfg configuration it is declared:
>
>  listen=tls:161.35.44.66:5061
>  listen=tcp:10.131.245.99:5061
>
> modparam ("dispatcher", "list_file", "/etc/kamailio/dispatcher.list")
> modparam ("dispatcher", "ds_probing_mode", 1)
> modparam ("dispatcher", "ds_ping_interval", 60)
>
> And this fragment was also added:
>
> event_route [tm: local-request] {
>
>          if (is_method ("OPTIONS") && $ ru = ~ "pstnhub.microsoft.com") {
>                 append_hf ("Contact: <sip: sbc.netvoiceperu.com: 5061;
> transport = tls> \ r \ n");
>          }
>          xlog ("L_INFO", "Sent out tm request: $ mb \ n");
> }
>
> There is something additional that has to be declared so that in the MS
> Teams panel the SIP OPTIONS STATUS column is shown as ACTIVE and not as
> WARNNING, in the MS TEAMS documentation it is a possible problem related to
> OPTIONS events.
>
> Saludos Cordiales
> --
> *Willy Valles Rios*
> *Unified Communications Specialist*
>
> phone: +51955747343
> em at il: willyvalles17 at gmail.com
>
>
> El jue, 7 ene 2021 a las 2:53, Daniel-Constantin Mierla (<
> miconda at gmail.com>) escribió:
>
>> Does this happen when Kamailio connects to MS Teams? The logs indicate
>> the received TLS certificate is not trusted:
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32425]: ERROR: tls
>> [tls_util.h:42]: tls_err_ret(): TLS write:error:14090086:SSL
>> routines:ssl3_get_server_certificate:certificate verify failed
>>
>> You can set debug=3 in kamailio.cfg and see if the DEBUG messages provide
>> more hints. For me it worked fine with Letsencrypt certs in Kamailio and
>> accepting what ever MS sent back. I used Debian 10 and libssl 1.1.
>>
>> Cheers,
>> Daniel
>>
>> On 06.01.21 21:47, Willy Valles Rios wrote:
>>
>> Hello community,
>>
>>
>> I am having trouble establishing SIP signaling between MsTeams and
>> Kamailio. I currently have this configuration in my tls.cfg file
>>
>>
>> [server: default]
>>
>> method = TLSv1.2 +
>>
>> verify_certificate = yes
>>
>> require_certificate = yes
>>
>> private_key = /etc/kamailio/certificates/private-key.pem
>>
>> certificate = /etc/kamailio/certificates/certificate.pem
>>
>>
>> [client: default]
>>
>> method = TLSv1.2 +
>>
>> verify_certificate = yes
>>
>> require_certificate = yes
>>
>> private_key = /etc/kamailio/certificates/private-key.pem
>>
>> certificate = /etc/kamailio/certificates/certificate.pem
>>
>>
>> My domain was certified with ssl through an authoritative certifier
>> (GoDaddy), however I see these errors in the / var / log / messages of the
>> Kamailio server.
>>
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_mod.c:389]: mod_init(): With ECDH-Support!
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_mod.c:392]: mod_init(): With Diffie Hellman
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_init.c:722]: tls_h_mod_init_f(): compiled with openssl version
>> "OpenSSL 1.0.2k-fips 26 Jan 2017" (0x100020bf), kerberos support: on,
>> compression: on
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_init.c:730]: tls_h_mod_init_f(): installed openssl library version
>> "OpenSSL 1.0.2k-fips 26 Jan 2017" (0x100020bf), kerberos support: on, zlib
>> compression: on#012 compiler: gcc -I. -I.. -I../include -fPIC -DOPENSSL_PIC
>> -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -DKRB5_MIT
>> -m64 -DL_ENDIAN -Wall -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2
>> -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4
>> -grecord-gcc-switches -m64 -mtune=generic -Wa,--noexecstack -DPURIFY
>> -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5
>> -DOPENSSL_BN_ASM_GF2m -DRC4_ASM -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM
>> -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM
>> -DECP_NISTZ256_ASM
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: WARNING: tls
>> [tls_init.c:787]: tls_h_mod_init_f(): openssl bug #1491 (crash/mem leaks on
>> low memory) workaround enabled (on low memory tls operations will fail
>> preemptively) with free memory thresholds 13107200 and 6553600 bytes
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO:
>> [core/cfg/cfg_ctx.c:598]: cfg_set_now(): tls.low_mem_threshold1 has been
>> changed to 13107200
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO:
>> [core/cfg/cfg_ctx.c:598]: cfg_set_now(): tls.low_mem_threshold2 has been
>> changed to 6553600
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO:
>> [main.c:2834]: main(): processes (at least): 25 - shm size: 67108864 - pkg
>> size: 4194304
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO:
>> [core/udp_server.c:154]: probe_max_receive_buffer(): SO_RCVBUF is initially
>> 212992
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO:
>> [core/udp_server.c:206]: probe_max_receive_buffer(): SO_RCVBUF is finally
>> 425984
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:305]: ksr_tls_fill_missing(): TLSs: tls_method=22
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:317]: ksr_tls_fill_missing(): TLSs:
>> certificate='/etc/kamailio/certificados/certificate.pem'
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:324]: ksr_tls_fill_missing(): TLSs: ca_list='(null)'
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:331]: ksr_tls_fill_missing(): TLSs: crl='(null)'
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:335]: ksr_tls_fill_missing(): TLSs: require_certificate=1
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:342]: ksr_tls_fill_missing(): TLSs: cipher_list='(null)'
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:349]: ksr_tls_fill_missing(): TLSs:
>> private_key='/etc/kamailio/certificados/private-key.pem'
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:353]: ksr_tls_fill_missing(): TLSs: verify_certificate=1
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:356]: ksr_tls_fill_missing(): TLSs: verify_depth=9
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:359]: ksr_tls_fill_missing(): TLSs: verify_client=0
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: NOTICE: tls
>> [tls_domain.c:1107]: ksr_tls_fix_domain(): registered server_name callback
>> handler for socket [:0], server_name='' ...
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:697]: set_verification(): TLSs: Client MUST present valid
>> certificate
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:305]: ksr_tls_fill_missing(): TLSc: tls_method=22
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:317]: ksr_tls_fill_missing(): TLSc:
>> certificate='/etc/kamailio/certificados/certificate.pem'
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:324]: ksr_tls_fill_missing(): TLSc: ca_list='(null)'
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:331]: ksr_tls_fill_missing(): TLSc: crl='(null)'
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:335]: ksr_tls_fill_missing(): TLSc: require_certificate=1
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:342]: ksr_tls_fill_missing(): TLSc: cipher_list='(null)'
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:349]: ksr_tls_fill_missing(): TLSc:
>> private_key='/etc/kamailio/certificados/private-key.pem'
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:353]: ksr_tls_fill_missing(): TLSc: verify_certificate=1
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:356]: ksr_tls_fill_missing(): TLSc: verify_depth=9
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:359]: ksr_tls_fill_missing(): TLSc: verify_client=0
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32409]: INFO: tls
>> [tls_domain.c:697]: set_verification(): TLSc: Server MUST present valid
>> certificate
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32422]: INFO: jsonrpcs
>> [jsonrpcs_sock.c:443]: jsonrpc_dgram_process(): a new child 0/32422
>>
>> Jan 6 15:13:45 Kamailio-Server /usr/sbin/kamailio[32424]: INFO: ctl
>> [io_listener.c:214]: io_listen_loop(): io_listen_loop: using epoll_lt io
>> watch method (config)
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32425]: ERROR: tls
>> [tls_server.c:1283]: tls_h_read_f(): protocol level error
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32425]: ERROR: tls
>> [tls_util.h:42]: tls_err_ret(): TLS write:error:14090086:SSL
>> routines:ssl3_get_server_certificate:certificate verify failed
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32425]: ERROR: tls
>> [tls_server.c:1287]: tls_h_read_f(): source IP: 52.114.75.24
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32425]: ERROR: tls
>> [tls_server.c:1290]: tls_h_read_f(): destination IP: 161.35.44.66
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32425]: ERROR:
>> [core/tcp_read.c:1493]: tcp_read_req(): ERROR: tcp_read_req: error reading
>> - c: 0x7f45242be028 r: 0x7f45242be150 (-1)
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32426]: ERROR: tls
>> [tls_server.c:1283]: tls_h_read_f(): protocol level error
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32426]: ERROR: tls
>> [tls_util.h:42]: tls_err_ret(): TLS write:error:14090086:SSL
>> routines:ssl3_get_server_certificate:certificate verify failed
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32426]: ERROR: tls
>> [tls_server.c:1287]: tls_h_read_f(): source IP: 52.114.132.46
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32426]: ERROR: tls
>> [tls_server.c:1290]: tls_h_read_f(): destination IP: 161.35.44.66
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32426]: ERROR:
>> [core/tcp_read.c:1493]: tcp_read_req(): ERROR: tcp_read_req: error reading
>> - c: 0x7f45242d9278 r: 0x7f45242d93a0 (-1)
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32427]: ERROR: tls
>> [tls_server.c:1283]: tls_h_read_f(): protocol level error
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32427]: ERROR: tls
>> [tls_util.h:42]: tls_err_ret(): TLS write:error:14090086:SSL
>> routines:ssl3_get_server_certificate:certificate verify failed
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32427]: ERROR: tls
>> [tls_server.c:1287]: tls_h_read_f(): source IP: 52.114.14.70
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32427]: ERROR: tls
>> [tls_server.c:1290]: tls_h_read_f(): destination IP: 161.35.44.66
>>
>> Jan 6 15:13:55 Kamailio-Server /usr/sbin/kamailio[32427]: ERROR:
>> [core/tcp_read.c:1493]: tcp_read_req(): ERROR: tcp_read_req: error reading
>> - c: 0x7f45242be028 r: 0x7f45242be150 (-1)
>>
>>
>> Could you help me identify the problem please.
>>
>>
>> Cheers
>>
>> Saludos Cordiales
>> --
>> *Willy Valles Rios*
>> *Unified Communications Specialist*
>>
>> phone: +51955747343
>> em at il: willyvalles17 at gmail.com
>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing Listsr-users at lists.kamailio.orghttps://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
>> --
>> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
>> Funding: https://www.paypal.me/dcmierla
>>
>>
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