Goautodial Logging in to your phone. Please wait The Gotodial was installed from ISO and agent had issue logging in. The login screen was hanging with the Logging in to your phone. Please wait… message. At that moment I did not have Letsencrypt certificate on Gotodial installed so it operated with default, self-signed certificate. In /var/log/messages there was the following: 1 2 May 15 20 : 45 : 31 centos - pbx - v3 . shared / usr / sbin / kamailio2093 : ERROR : tls [ tls_util . h : 42 ] : tls_err_ret ( ) : TLS read : error : 14094412 : SSL routines : ssl3_read_bytes : sslv3 alert bad certificate May 15 20 : 45 : 31 centos - pbx - v3 . shared / usr / sbin / kamailio2093 : ERROR : [ core / tcp_read . c : 1352 ] : tcp_read_req ( ) : ERROR : tcp_read_req : error reading - c : 0x7f07eec63328 r : 0x7f07eec633a8 and 1 TLS read : error : 14094412 : SSL routines : ssl3_read_bytes : sslv3 alert bad certificate In /etc/kamailio/tls.conf I changed “method” to SSLv23