Blocking openwrt router devices access to master router devices

Looking to block access to my main home router clients, from clients on my openwrt network, any ideas?

Setup is modem to asus router/ lan to wan openwrt router. Setup needs to stay this way.


Remove the default traffic forwarding and add a custom firewall rule that allows to forward traffic which destination doesn't match the the upstream network.

It should be similar to the following:

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ok thankyou, will have a look at this tomorrow

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