You'll need a replacement ISP modem from the same provider as the original one.
You'll need a replacement ISP modem from the same provider as the original one.
I thought you were familiar with the fact that the 6141 is clearly a superior unit! Broadcom outperforms Intel in this area, while the Puma7 seems to face similar problems, and the newest firmware hasn’t resolved all the issues it introduced.
First, identify the modem or router your ISP supplies. It might be possible to set it to 'modem mode' so it functions only as a connection point for your ISP. Then connect your own router and, for better Wi-Fi performance, add some access points. Most routers feature four Ethernet ports on the back, which may mean you don’t need a separate switch unless required.
You still require a router (unless those recommended ones are all-in-one). If you need DPI from Ubiquity, you'll need their edge router. You might prefer a switch, but using a POE switch simplifies things for you. You don't have to rely on a cloud key; this setup works on any computer. I've personally purchased a Synology NAS for additional storage and run the cloud controller there. (If you opt for a newer model, Docker can handle it, or someone has created a package for the Synology OS.)
Consider the Edge router that fits your needs, and remember DPI refers to data packet inspection.
You seem to be looking for a more affordable setup. A modem/router combo could work well. @Lurick can help pick the right model, and you might not need high DPI settings. Using the router as a DHCP server is a good idea—especially if you're using Unifi Lite APs, you can rely on your NAS for that.
Consider a modem such as the SB6183 or CM600. If you're on a tighter budget, the SB6141 is an option, though its support timeline is uncertain due to rumors about Comcast phasing out certain models. Remember, regular cable modems don’t include routers. You’ll also need a router. Based on the router choice, you might require a switch. If you rely solely on wired connections, additional access points are necessary. Xfinity charges $10 per month for renting their equipment. The person posting would likely save money by purchasing a modem themselves rather than paying $120 annually.
DPI is in the UniFi lineup. UniFi routers have DPI as well. There's also IDS in beta but it causes a huge hit on performance (no hardware offload). @Datrat I can recommend the USG (UniFi) or the Edgerouter Lite. If you want some serious firepower, the Edgerouter 4 is a powerful router. Also be careful, there is a new model of the APs where they don't come with a PoE injector in the box.