PCC firewall protection for internal clients

Hi! newbie here. I’ve just configured a MT as a PCC router.

My doubt is about securing the internal clients, do I still need to create firewall rules for securing them or is the configuration described for PCC in the wiki1 enough?

I just want to allow all outbound traffic, not allowing external connections initiated from the Internet.

If the wiki is not complete, what firewall rules do you reccomend me to configure?

Thanks for any help!

There is no firewall filter rules in that config, you will have to add filter rules to protect internal clients