Guest network : allow lan access but no internet

[bmn1]

Hello,
I'm trying to block internet access for some devices connected on my LAN : I suspect them to send informations without my knowledge.
(IoT devices such as connected lighbulb...)

An option in the "guest network" to allow lan access but no internet would be very useful for this purpose !

Does anyone know if I could use a iptables command to achieve such a thing ?

Thank you !

 

[RMerlin]

An option in the "guest network" to allow lan access but no internet would be very useful for this purpose !

Use Parental Control for your guest clients, and don't enable any period of time where Internet access would be allowed.

 

[bmn1]

Use Parental Control for your guest clients, and don't enable any period of time where Internet access would be allowed.

Thank you for this fast and usefull answer !