MqTT in Wiser for KNX

[JRP]

This work with my broker so your issue is somewhere there.  Can you connect to your broker by using  MQTT Explorer  client but from another machine?

Hello
I have tried with Mqtt explorer and MQtt.fx and neither of them connects from another pc. I put the IP of the pc where I have mosquitto installed and the username and password and nothing.
Surely the problem comes from here.
I have all the computers on the same network, I ping and they all respond.
If in MQtt.fx installed on the same pc as the broker, I put instead of address 127 ......., the ip address of the same pc 192.168.012. It connects and on netstat I see the connection to port 1883.
Will I be the router that blocks traffic? It is what occurs to me.
Thanks for the help.
a greeting