Trying to understand the events involved for a Router to get recognized with a WAN IP address thru a Modem. This is with a CATV ISP (Spectrum/TWC if that matters ...

I'm trying to swap my quad-core AM1 Untangle firewall box (40 watts) for an A1SRi-based firewall box (22 watts). Try as I may, the A1SRi box will not pull an IP address via DHCP from the modem. I've ...