eclipse
The default 1883 listener is always active (2.0.14)
with this mosquitto.conf (2.0.14)
listener 8001 1.2.3.4
socket_domain ipv4
protocol mqtt
listener 8002 1.2.3.4
socket_domain ipv4
protocol websockets
I expect only two running listeners, but the 1883 listener is also active:
tcp 0 0.0.0.0:1883 0.0.0.0:* LISTEN 17293/mosquitto
tcp 1.2.3.4:8001 0.0.0.0:* LISTEN 17293/mosquitto
tcp 1.2.3.4:8002 0.0.0.0:* LISTEN 17293/mosquitto
tcp6 :::1883 :::* LISTEN 17293/mosquitto
I cannot find any information in the documentation to prove that this is the expected behaviour.
How can I disable the default listener (1883)?
The default listener only listen to the local address if present and should be disabled when a listener is specified. mosquitto.conf documentation says
listener port [bind address/host/unix socket path] Listen for incoming network connection on the specified port. A second optional argument allows the listener to be bound to a specific ip address/hostname. If this variable is used and neither the global bind_address nor port options are used then the default listener will not be started.
using your config file results in only 2 ports on my system.
$ mosquitto -c strange.conf
1648540343: mosquitto version 2.0.14 starting
1648540343: Config loaded from mqtt.conf.
1648540343: Opening ipv4 listen socket on port 8001.
1648540343: Opening websockets listen socket on port 8002.
1648540343: mosquitto version 2.0.14 running
$ ss -antp | grep mosquitto
LISTEN 0 100 1.2.3.4:8001 0.0.0.0:* users:(("mosquitto",pid=25820,fd=4))
LISTEN 0 4096 1.2.3.4:8002 0.0.0.0:* users:(("mosquitto",pid=25820,fd=8))
what does your log file look like?
The log:
Mar 29 10:15:50 mosquitto: 2022-03-29T10:15:50: mosquitto version 2.0.14 starting
Mar 29 10:15:50 mosquitto: 2022-03-29T10:15:50: Config loaded from /etc/mosquitto/mosquitto.conf.
Mar 29 10:15:50 mosquitto: 2022-03-29T10:15:50: Opening ipv4 listen socket on port 8001.
Mar 29 10:15:50 mosquitto: 2022-03-29T10:15:50: Opening websockets listen socket on port 8002.
Mar 29 10:15:50 mosquitto: 2022-03-29T10:15:50: Opening ipv4 listen socket on port 1883.
Mar 29 10:15:50 mosquitto: 2022-03-29T10:15:50: Opening ipv6 listen socket on port 1883.
Mar 29 10:15:50 mosquitto: 2022-03-29T10:15:50: mosquitto version 2.0.14 running
Mar 29 10:15:50 systemd: Started Mosquitto MQTT Broker.
My full mosquitto.conf file:
per_listener_settings false
allow_zero_length_clientid false
max_inflight_messages 1
max_queued_messages 1000
max_packet_size 135168
max_qos 2
memory_limit 67108864
persistent_client_expiration 14d
max_keepalive 300
autosave_interval 600
persistence true
persistence_file mosquitto.db
persistence_location /var/lib/mosquitto/
log_type all
log_timestamp_format %Y-%m-%dT%H:%M:%S
connection_messages true
websockets_log_level 0
cafile /etc/mosquitto/...
certfile /etc/mosquitto/...
keyfile /etc/mosquitto/...
dhparamfile /etc/mosquitto/...
require_certificate true
use_identity_as_username true
listener 8001 1.2.3.4
socket_domain ipv4
max_connections 100
protocol mqtt
listener 8002 1.2.3.4
socket_domain ipv4
max_connections 100
protocol websockets
Maybe I should put the listener definitions on top of the config file?
I'm more thinking if you can try throw your cert-configs under a listener block.
yeah, that did the trick... now I only have two listeners. Thank you!
per_listener_settings false
allow_zero_length_clientid false
max_inflight_messages 1
max_queued_messages 1000
max_packet_size 135168
max_qos 2
memory_limit 67108864
persistent_client_expiration 14d
max_keepalive 300
autosave_interval 600
persistence true
persistence_file mosquitto.db
persistence_location /var/lib/mosquitto/
log_type all
log_timestamp_format %Y-%m-%dT%H:%M:%S
connection_messages true
websockets_log_level 0
listener 8001 1.2.3.4
socket_domain ipv4
max_connections 100
protocol mqtt
listener 8002 1.2.3.4
socket_domain ipv4
max_connections 100
protocol websockets
cafile /etc/mosquitto/...
certfile /etc/mosquitto/...
keyfile /etc/mosquitto/...
dhparamfile /etc/mosquitto/...
require_certificate true
use_identity_as_username true
Something similar happens when you have per_listener_settings active (true) and have one of the listener config entries before your first listener. This happened to me with allow_zero_length_client_id as I switched per_listener_settings to true and overlooked this entry. It took me a whole while to figure out why a listener on port 1883 was starting. I only noticed it, because I had configured a listener for that port, too, and Mosquitto was not starting anymore. Else I might have ended up with an accidentally opened port.
We're currently using Mosquitto 2.0.12.
in my case, the 'include_dir' triggered the default listener.
in that directory, the first file (starting with 00-) defined a new listener, and that still made the default listener ran.
it looks like that this behavior was not mentioned in the per_listener_settings section in the document of mosquitto.conf
