Hi, I'm trying to register a yealink with TLS, using my one certificates. I follow the wiki and In fs i have both agent.pem and cafile.pem . I install in the phone the root certificate. But when i try to register, i have (tport log): tport.c:3186 tport_recv_iovec() tport_recv_iovec(0x808fb0) msg 0x7fe9d0aa8180 from (udp/192.168.10.1:5060) has 340 bytes, veclen = 1 tport.c:3004 tport_deliver() tport_deliver(0x808fb0): msg 0x7fe9d0aa8180 (340 bytes) from udp/192.168.10.23:5060/sip next=(nil) tport.c:4202 tport_release() tport_release(0x808fb0): 0x7fe9d01142f0 by 0x7fe9d025d920 with 0x7fe9d0aa8180 tport.c:2730 tport_wakeup_pri() tport_wakeup_pri(0x7fe9c802aad0): events IN tport.c:869 tport_alloc_secondary() tport_alloc_secondary(0x7fe9c802aad0): new secondary tport 0x7fe9c03e8450 tport_type_tls.c:603 tport_tls_accept() tport_tls_accept(0x7fe9c03e8450): new connection from tls/192.168.10.36:48754/sips tport_tls.c:869 tls_connect() tls_connect(0x7fe9c03e8450): events NEGOTIATING tport_tls.c:869 tls_connect() tls_connect(0x7fe9c03e8450): events NEGOTIATING tport_tls.c:526 tls_post_connection_check() tls_post_connection_check(0x7fe9c03e8450): Peer did not provide X.509 Certificate. I could make it work and have a register in the tls profile when i check on the phone the option in Security->Trusted Certificates: "Only Accept Trusted Certificates: DISABLED". Could it be some bug in the yealink, or I’m missing something in the conf... Another question, is there any problem if i choose to use this configuration... since is the phone that ignores the certificate and the validation is done by the server and not by the client. Can you help me? Thanks, António