I've given up for the night but here goes.
Existing network is ISP Modem - Router(WIFI) - Router(wired only)
Plan to have the Untangle be the internet facing router, the wifi go to AP mode, and the wired router to bridge or double up like is working now.
Put untangle ISP modem link to link 1, connected link 2 to PC per setup. Logged into Untangle and did initial setup and update process. Setup as router. PC has connectivity to internet not apparent issues.
Add second router to link 3. Comm lights light up. But no connection. Untangle doesn't see it in DHCP table. Interface section says the link is not being used.
Swap PC to routers. No connection to untangle. Place it in bridge/AP only mode. Back to untangle, nothing.
Rerun untangle wizard and only during that does the link 3 show active in interfaces.
Add WIFI router in AP mode to link 4, no communication. Comm lights at cable interfaces are active.
I've even tried placing the PC into link 3 and 4 and no communication. Place both routers in Link 2. They don't pull a IP from the untangle DHCP server, but the PC will just fine.
It's very late so I'm missing something dead simple or I just don't know at this point.
Any help appreciated.