I have just gotten an RB2011UAS-2HND-IN. I am new to advanced features of router. I want to setup two LANs on this router. I need to allow normal internet traffic to PCs on first network, but I want to Whitelist the second network (PBX) so that only the sip provider's IPs and LAN traffic can go through to PBX and phones. What would be the best way to set up this Whitelist?
Thank you