how to block dhcp from my client to me and Sharing files and folders?

built this rule under ip -> firewall -->> filter rules

add chain=forward action=drop dst-port=68 protocol=udp comment="DROP DHCP \
SERVERS" disabled=no
add chain=input action=drop dst-port=68 protocol=udp comment="" disabled=no

this way you are blocking broadcasting from port 68 of users whose wake up a dhcp server

are broadcast packets affected by forward chain?

are broadcast packets affected by forward chain?

And how to block them?

Turn off "forwarding" on the wireless side; such as disable "default forward" if you have are using "default authenticate", or uncheck "Forwarding" in the access list entry for a MAC address. This will prevent DHCP from broadcasting to other wireless clients.

Turn off "forwarding" on the wireless side; such as disable "default forward" if you have are using "default authenticate", or uncheck "Forwarding" in the access list entry for a MAC address. This will prevent DHCP from broadcasting to other wireless clients.

What exactly turning off default-forwarding do? It just stops broadcasting all broadcasts from clients? This would be great, cause I had quite a few issues related to this (private DHCP server on client side, providing incorrect leases, etc.)
But I still would like to have clients able to speak between each other. How the arp who-has will be responded if it will not be broadcasted to all clients. Would AP be able to make this working?

Add filters in the bridge on the wireless interface

add chain=input mac-protocol=ip src-port=67 ip-protocol=udp action=drop comment="Drop DHCP" disabled=no in-interface=wireless

add chain=forward mac-protocol=ip src-port=67 ip-protocol=udp action=drop comment="Drop DHCP" disabled=no in-interface=wireless

Remember that broadcast working on layer 2

Can't get this to work.
I have routeros 3.4 on a RB192...

Do i have to mark packets in Mangle first? How should i do this?