CODEWITHSUNDEEP
mosquitto
LorenzoBerti
LorenzoBerti

Reputation: 6974

Mosquitto SSL connection refused

Hello I have installed mosquitto broker on my Raspberry Pi. I'm trying to activate SSL but when I try to publish a message it returns connection refused.

My conf is:

# MQTT over TLS/SSL
listener 8883
cafile /etc/mosquitto/certs/ca.crt
certfile /etc/mosquitto/certs/hostname.crt
keyfile /etc/mosquitto/certs/hostnmae.key
tls_version tlsv1.2

# WebSockets over TLS/SSL
listener 9883
#protocol websockets
cafile /etc/mosquitto/certs/ca.crt
certfile /etc/mosquitto/certs/hostname.crt
keyfile /etc/mosquitto/certs/hostname.key
tls_version tlsv1.2

When I try:

mosquitto_pub --cafile /etc/mosquitto/certs/ca.crt -h localhost -t "test" -m "message" -p 8883

it return

Error: Connection refused

without logs.

Upvotes: 0

Views: 4005

Answers (1)

romkey
romkey

Reputation: 7109

"Connection refused" means that nothing is listening on the port you tried to connect to, 9883.

It's possible the Mosquitto just isn't running, or that it's not actually listening on the port (perhaps it didn't read the correct configuration file, or the configuration file correctly).

You can use lsof to find out what processes are listening on a port, or what ports a process is listening on.

For instance, lsof -I :9883

will tell you what processes are listening on port 9883. If you don't see any then there's a problem with the Mosquitto server. lsof -c mosquitto | grep TCP

will show you a what ports Mosquitto is listening on. ps ax | grep mosquitto

will show you if Mosquitto is actually running.

If Mosquitto is running but port 9883 doesn't show up then it'll need to figure out why it's not picking up your configuration.

If it's not running you'll need to figure out why.

You may need to install lsof. You can do that with sudo apt-get install lsof

Upvotes: 3

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