I want to get my tivo permanently put on the internet, but I ideally don’t want the hassle of an actual router unit. I have 2 NICs on the PC - and I should probably remember how to do this, but I don’t - if I set it up correctly, I can have requests from one device route through one NIC, through the computer, to the other NIC that has internet access, and therefore have both devices have internet access without a dedicated router (the computer acts as a minimally functional router).
Is there an easy method to do this? A piece of software that sets up the routing tables or NAT if that’s required? If not, how would I go about doing it myself? Manually setting the second NICs routing table to point basically all traffic though the first NIC? Would that even work, or would the cable modem reject the second NICs IP because I’m limited to one IP per modem?