<div dir="ltr">Hi everyone, <div><br></div><div>I'm trying to integrate Ms Teams and Opensips and I'm having some problems. </div><div><br></div><div>I tried to use self signed and Letsencrypt certificates, with no success. I always receive a ''no TLS client domain found'. </div><div><br></div><div> /usr/sbin/opensips[505412]: ERROR:proto_tls:proto_tls_conn_init: no TLS client domain found<br> /usr/sbin/opensips[505412]: ERROR:core:tcp_conn_create: failed to do proto 3 specific init for conn 0x7f7220f343b0<br> /usr/sbin/opensips[505412]: ERROR:core:tcp_async_connect: tcp_conn_create failed<br></div><div><br></div><div>Here my opensips.cfg: </div><div><br></div><div>loadmodule "tls_mgm.so"<br> <br>/*#first the  server domain */<br>modparam("tls_mgm", "server_domain", "default")      <br>modparam("tls_mgm", "certificate", "[default]/etc/letsencrypt/live/<a href="http://sbc.mydomain.com/fullchain.pem">sbc.mydomain.com/fullchain.pem</a>")      <br>modparam("tls_mgm", "private_key", "[default]/etc/letsencrypt/live/<a href="http://sbc.mydomain.com/privkey.pem">sbc.mydomain.com/privkey.pem</a>")   <br>modparam("tls_mgm", "ca_list", "[default]/etc/letsencrypt/live/<a href="http://sbc.mydomain.com/inter.pem">sbc.mydomain.com/inter.pem</a>")  <br>modparam("tls_mgm", "match_sip_domain", "[default]<a href="http://sbc.mydomain.com">sbc.mydomain.com</a>") <br>modparam("tls_mgm", "verify_cert", "[default]0")<br>#modparam("tls_mgm", "require_cert", "[default]1")<br>#modparam("tls_mgm", "ciphers_list", "[default]AES128-SHA256:AES256-SHA")<br>modparam("tls_mgm", "tls_method", "[default]SSLv23")<br> <br><br> # #and the client domain                                <br>modparam("tls_mgm", "client_domain", "client")       <br>modparam("tls_mgm", "certificate", "[client]/etc/letsencrypt/live/<a href="http://sbc.mydomain.com/fullchain.pem">sbc.mydomain.com/fullchain.pem</a>")      <br>modparam("tls_mgm", "private_key", "[client]/etc/letsencrypt/live/<a href="http://sbc.mydomain.com/privkey.pem">sbc.mydomain.com/privkey.pem</a>")    <br>modparam("tls_mgm", "ca_list", "[client]/etc/letsencrypt/live/<a href="http://sbc.mydomain.com/inter.pem">sbc.mydomain.com/inter.pem</a>")<br>#modparam("tls_mgm", "ca_dir", "[client]/etc/letsencrypt/live/<a href="http://sbc.mydomain.com/">sbc.mydomain.com/</a>")  <br>modparam("tls_mgm", "match_sip_domain", "[client]<a href="http://sbc.mydomain.com">sbc.mydomain.com</a>")<br> <br>modparam("tls_mgm", "verify_cert", "[client]0")<br> # modparam("tls_mgm", "require_cert", "[client]1")<br> # modparam("tls_mgm", "ciphers_list", "[client]AES128-SHA256:AES256-SHA")<br>modparam("tls_mgm", "tls_method", "[client]SSLv23")</div><div><br></div><div>I also changed the certificates, using self signed in "server domain" only or "client domain" only. Same result. </div><div><br></div><div>Using the openssl the verify the certificates, I receive a OK in console: </div><div><br></div><div>fullchain.pem: OK</div><div><br></div><div>The inter.pem is the file with the root and intermediate Letsencrypt certificates. </div><div><br></div><div>On the Ms Teams side, I checked the FQDN used, checked the firewall ports etc.</div><div><br></div><div>I followed this tutorial: <a href="https://blog.opensips.org/2019/09/16/opensips-as-ms-teams-sbc/">https://blog.opensips.org/2019/09/16/opensips-as-ms-teams-sbc/</a> , so I'm using the Dynamic Routing module to send the OPTIONS packet. The opensips start the communication using TLS, I see the packets using TLS in 5061 port, but when Opensips will answer, this message appears on the console and the connection is closed. </div><div><br></div><div>/usr/sbin/opensips[505398]: ERROR:tm:t_uac: attempt to send to 'sip:<a href="http://sip.pstnhub.microsoft.com">sip.pstnhub.microsoft.com</a>' failed<br>/usr/sbin/opensips[505398]: ERROR:proto_tls:proto_tls_conn_init: no TLS client domain found<br>/usr/sbin/opensips[505398]: ERROR:core:tcp_conn_create: failed to do proto 3 specific init for conn 0x7f7220f4df40<br></div><div><br></div><div>What I'm not seeing? Did someone pass through this problem? </div><div>Best regards</div></div>