Dear community, The background story: As you all know a lot of people that can work from home due to COVID19. All works well when your NBN works but when it stops then you are out of work. The solution is failsafe backup using 4G LTE modem. I purchased Netgear 4G LTE LB2120 and a data sim card loaded data on the sim power on the modem did its round of lights flashing then I connected it’s LAN port to my pc LAN port and it worked I had the internet. 4G router has IP address 192.168.5.1 and has 2 ports one is WAN and the other is LAN My network the router lets call it (TPG Router TP-Link AC1600) with WIFI, WAN port and 4LAN ports has IP 192.168.1.1 with range from 192.168.1.100 to 192.168.1.199 I’m good with following detailed instructions and not really a network guy. Now the Problem: According to the little booklet that come with 4G router all you need to do is once you know your internet works is disconnect the cable from WAN port on my (TPG Router TP-Link AC1600) and connect it to the WAN port on the 4G Modem. That means that my NBN modem is now connected to the WAN port on the 4G Modem. Connect another cable to the WAN port on my (TPG Router TP-Link AC1600) and the other end connect to the LAN port on the 4G Modem. This creates a connection that from NBN modem passes throughout the 4G router and the router then decides if there is no NBN to switch to 4G and send the signal to the WAN port on my (TPG Router TP-Link AC1600) I connected exactly as it was described in the little booklet and as I described here but I don’t have internet on my WIFI and no Internet on my LAN Ports. So I guess there must be some sort of config that needs to be done on my (TPG Router TP-Link AC1600) or 4G Modem or both. How does this configuration looks like I Don’t know Please help hopefully with detailed instructions. Regards, Zoro ... View more