[John] Redmi AC2100 OpenWrt installation (web exploit)

Get into the AC2100 stock firmware by SSH then use MTD command to flash the Openwrt images. You know how we get the SSH access of AX3600 right? It’s very simple, Just open a few links then the job is done. This solution works for multiple devices, AX3600, AX1800 and AX5. Now we can add AC2100 into the list.