@andreanet said in correct installation and configuration:
the source 10.10.10.9 is the IP address of the Lansonia router
Do you have another "router" connected or perhaps you mean wifi Access Point?
If it's an AP, and 10.10.10.9 is just the management interface for that AP, try disabling that rule. Then you will still see that all wifi clients will be able to access internet. Any traffic not targeting rule number two (destination 10.10.10.1 I suppose) will simply hit the last rule allowing internet access.