MQTT Server setting

Quick question

Is the setting for MQTT Server a ‘global’ setting meaning whatever is is set in one channel is the same for any other, OR is a per channel setting?

I setup a Mosquito MQTT server on a Debian server here at home, got it working but haven’t tried it with Meshtastic. I don’t want to have to change the MQTT server if I switch from a public channel to a private channel.

If this is not possible, maybe a suggestion for a future feature?

Hope all makes sense.

Thanks