I prefer to treat my ISP-supplied equipment as foreign territory, so their modem is in passthrough mode on purpose. Its only client is my own standalone firewal

I prefer to treat my ISP-supplied equipment as foreign territory, so their modem is in passthrough mode on purpose. Its only client is my own standalone firewall, since I have its Wi-Fi turned off. As long as I'm not messing with the network, it's all great, and I know where to start looking if there is odd traffic going on.