OpenWRT, ISP modem and dynamic IP addresses: how to fix connectivity issues without rebooting your router every time

from blog ./techtipsy, | ↗ original
My current ISP provides an internet connection over a copper wire. To use it, I have a crappy modem (Technicolor CGA2121, DOCSIS 3.0). It’s running in bridge mode, meaning that all it does is convert the signal running over the coax cable into plain old Ethernet. My main networking device is a TP-Link Archer C7 v5. It runs OpenWRT. This...