# Second Pi won't connect to MQTT on First Pi
**URL:** https://discourse.nodered.org/t/second-pi-wont-connect-to-mqtt-on-first-pi/69674
**Category:** General
**Created:** [27 October 2022 13:06 UTC](https://discourse.nodered.org/t/second-pi-wont-connect-to-mqtt-on-first-pi/69674 "2022-10-27T13:06:59Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Richard238](https://discourse.nodered.org/u/Richard238)
#### Post date: [27 October 2022 13:06 UTC](https://discourse.nodered.org/t/second-pi-wont-connect-to-mqtt-on-first-pi/69674/1 "2022-10-27T13:06:59Z")
I have two Pi's, one as MQTT broker.
This can connect MQTT-out just fine, with MQTT server set to localhost, or IP address
On Pi2, I cannot get the node-red MQTT-in node to connect to Pi1
What have I missed here?
Thank you
---
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [27 October 2022 13:26 UTC](https://discourse.nodered.org/t/second-pi-wont-connect-to-mqtt-on-first-pi/69674/2 "2022-10-27T13:26:00Z")
Have you configured mosquitto (assuming you are using mosquitto) to allow network connections? If not then create a file in /etc/mosquitto/conf.d/ called, for example `mossy.conf` (anything.conf will do) and in there put
```auto
# allow network access without a password
listener 1883
allow_anonymous true
# human readable timestamps in log
log_timestamp true
log_timestamp_format %Y-%m-%d %H:%M:%S
```
The timestamp bit is not essential, but tells mosquitto to put readable timestamps in its log. Then restart mosquitto
`sudo systemctl restart mosquitto`
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### Author:  [@Richard238](https://discourse.nodered.org/u/Richard238)
#### Post date: [27 October 2022 13:53 UTC](https://discourse.nodered.org/t/second-pi-wont-connect-to-mqtt-on-first-pi/69674/3 "2022-10-27T13:53:38Z")
> [@Colin](#):
>
> Have you configured mosquitto (assuming you are using mosquitto) to allow network connections?
That's done it, thank you.
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [10 November 2022 13:53 UTC](https://discourse.nodered.org/t/second-pi-wont-connect-to-mqtt-on-first-pi/69674/4 "2022-11-10T13:53:51Z")
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