Setup Guide: DHCP mode on XB6 and other Xfinity Routers

Most Xfinity routers should work with the Simple mode, except XB6,  here is a simple tutorial to install Firewalla with XB6.  This also applies to all Xfinity routers that you want to run in DHCP Mode.

A small article on Simple mode vs. DHCP mode

Step 1:

Connect Firewalla to the back of XB6 ethernet.   Connect Power.  And wait for 5 to 7 min.

Step 2:

Launch app, when asked to test, pick "Manual Setup" => "DHCP Mode"

Step 3:  Configure Xfinity XB6

Login Router and Tap on Connected Devices

Step 4: Reserve an IP for Firewalla

write down the IP, 10.0.0.237 (yours will be different)

 Step 5: Limit DHCP

Tap on Connection->Local IP Network and limit the IP you got from step 4

Yours should look like this

Step 6: Done

Now you may need to reboot or wait for devices to start getting the 192.168.218.x address.