I currently have the G-1100 router. It's built in firewall does not have much flexibility. I want to configure multiple rules per user. I'm thinking that what I need to do is to buy an external firewall and connected to the router - most likely between the router and the FIOS line so that wireless is covered as well as regular Ethernet. Have any of you done this? Do you have Firewall recommendations? Is there a router upgrade that would cover this?