First of all, we highly recommend using the Firewalla Gold and Purple in router mode. In this mode, the Firewalla will become your main router and it will manage your network inline between your network and your ISP modem/router, with no compatibility issues.
When to use Firewalla Gold/Purple in DHCP Mode?
- You only want to augment your network with the security monitoring capability of the Firewalla, without having to rewire your network.
- Your router is not compatible with Firewalla Simple mode. (This article has the compatibility guidelines.)
1. Unlike Firewalla Red and Blue, Firewalla Gold and Purple's DHCP Mode will NOT create another overlay network (192.168.218.X). It will use the same subnet as your original network, so that you don't have to configure the IP range used for DHCP on Firewalla in order to keep your network unchanged.
2. Firewalla will be the gateway of all devices in this network.
How to set up Gold/Purple in DHCP Mode?
Example: You have your own router connecting to an ISP modem, and you want Firewalla to monitor the network on the router.
Step 1: Wire up the box by following the instructions on Firewalla Installation Guide. The LAN port of your router should be connected to Gold's Port 4 (Default WAN Port), or Purple's WAN Port.
Step 2: Set up Firewalla with the app, it will guide you to set up with DHCP Mode. Choose manual setup -> DHCP mode to skip the compatibility test.
Step 3: When the set up is complete, turn off the DHCP service on the router. For routers that don't provide an option to turn off the built-in DHCP service, here is a simple workaround.
Step 4: Have all the devices connected to your original router to rejoin network in order to set the gateway to Firewalla (you can either turn off/on the airplane mode on your mobile devices or simply reboot your devices).