I'm attempting to set up a firewall on my church's WRT54GL running dd-wrt v24. I've not found many good guides at setting up a firewall, and nothing that seems to be recent enough with these routers.
Basically, I want to set the firewall to block all incoming traffic on the non-essential ports, restrict certain local computers from accessing a fileserver, and block a few outgoing ports.
I've tried messing around with fwbuilder (Firewall Builder) but have had no luck. I can get my changes to commit to the firewall but I can't seem to get them to actually work.
Anyone able to help?