Getting error message when I use SSL on my server running Mosquitto?

_x000D_ _x000D_ I have implemented the mosquitto broker for ubuntu on port 8883 and port 1883 and can't figure out why I keep getting the CA related errors shown below. It happens when I test it using mosquitto_pub locally on the server and when I use the Paho/Python script as the client on my MacBook. My mosquitto.config file, mosquitto_pub command, and my mosquitto log messages are shown below. I've also included my openssl certificate creation commands in case I did something wrong. This is my mosquitto.conf file # Place your local configuration in /etc/mosquitto/conf.d/ # A full description of the configuration file is at # /usr/share/doc/mosquitto/examples/mosquitto.conf.example pid_file /var/run/mosquitto.pid persistence true persistence_location /var/lib/mosquitto/ #log_dest file /var/log/mosquitto/mosquitto.log log_dest stdout include_dir /etc/mosquitto/conf.d log_type all #----------------------------------------------- #Default Listener #----------------------------------------------- port 8883 #------------------------------------------------ #Certificate Based SSL/TLS Support #------------------------------------------------ cafile /../etc/mosquitto/ca_certificates/ca.crt keyfile /../etc/mosquitto/certs/server.key certfile /../etc/mosquitto/certs/server.crt listener 1883 This is the mosquitto_pub command I use to test it. sudo mosquitto_pub -h 305.875.987.34 -t test -m "Typing this" -p 8883 --cafile /../etc/mosquitto/ca_certificates/ca.crt This is what the mosquitto log says when I run it. 1546507891: mosquitto version 1.5.5 starting 1546507891: Config loaded from /../etc/mosquitto/mosquitto.conf. 1546507891: Opening ipv4 listen socket on port 1883. 1546507891: Opening ipv6 listen socket on port 1883. 1546507891: Opening ipv4 listen socket on port 8883. 1546507891: Opening ipv6 listen socket on port 8883. 1546507929: New connection from 305.875.987.34 on port 8883. 1546507929: OpenSSL Error: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca 1546507929: Socket error on client , disconnecting. These are the openssl commands I used to create ca.crt, server.crt, and server.key. I created them in a folder called certs. openssl genrsa -des3 -out ca.key 2048 openssl req -new -x509 -days 1826 -key ca.key -out ca.crt openssl genrsa -out server.key 2048 openssl req -new -out server.csr -key server.key openssl x509 -req -in server.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out server.crt -days 360 I then moved ca.crt to /../etc/mosquitto/ca_certifications after deleting an old ca.crt I had made trying to fix the problem. I did this with the following two commands. sudo rm /../etc/mosquitto/ca_certifications/ca.crt sudo mv ca.crt /../etc/mosquitto/ca_certifications I did the same thing with server.crt and server.key except I put them in /../etc/mosquitto/certs. The broker seems to work fine on port 1883. Let me know if you need any more info.