I am trying to simply copy a file from 192.168.1.225 to 192.168.1.228

I'm executing the following command from a ubuntu VM at ip 192.168.1.228. (I'm trying to do a ***pull***, if i'm not wrong in the term)

    rsync rsync://realtebo@192.168.1.225/pihole_conf/black.list /etc/pihole/black.list

In the .225 I created the pihole_conf as follows

    realtebo@192.168.1.225$ cat /etc/rsyncd.conf
    [pihole_conf]
    comment = Pihole configuration
    path = /etc/pihole
    auth users = realtebo
    hosts allow = *
    hosts deny = * 
    list = false 

This is the error

    @ERROR: Unknown module 'pihole_conf'
    rsync error: error starting client-server protocol (code 5) at main.c(1666) [Receiver=3.1.2]

I'd like an help to understand the source of the problem.