Hi all, I am sharing this for others so that if you have Google Wifi, the following instructions for a Sagemcom Gateway F@ST 3864 will allow your Google Wifi to operate to its full potential and for your UPnP and Port Forwarding to also work correctly (to enable remote access for Home Security etc).
Posted by GlynR (Contributor) 9th Feb 2017, 11:52am Member since 31st Jul 2015 with 54 Posts Message 16 of 25 (1,612 Views) Optus Sagemcom in Bridge Mode (almost) For (semi-technical) people who want to get around the limitations of the crippleware Optus Sagemcom modem ... The ideal would be to replace the modem with a much better modem/router and just put the Sagemcom modem into the cupboard. However, if you want to use the home phone facility, Optus makes it almost impossible to dispense with their crippleware modem. In any case you need to keep the Sagemcom for when you have an internet problem and then you can reconnect it (before you contact Optus) to decide whether the problem was with your "real" modem or the NBN network. I've heard people asking about using the Optus Optus modem in bridge mode and then adding their own modem/router of choice but Optus don't support bridging and the home phone service would probably stop working if you did put the modem in bridge mode. So ... There is an easy way to (almost) get the modem into bridge mode. Turn off the WIFI in the Optus Sagemcom modem Connect the WAN port of your "real" modem to one of the Sagemcom's Ethernet ports Identify the MAC address of the WAN port on your "real" modem and reserve an IP address for that MAC address in the Sagemcom modem (Advanced Setup / LAN then ENABLE DHCP SERVER and click on ADD ENTRIES) Often the MAC address of the WAN port is printed on a label on the bottom of the router but you should also be able to see it if you go into the Sagemcom modem and choose DEVICE INFO and then DHCP Note that in my own network I have the Sagemcom modem set to IP Address 192.168.47.1 and not 192.168.0.1 (so that I can setup VPNs to other networks with the IP sdubnet of 192.168.0.x). So if the IP address of the Sagemcom is 192.168.0.1 then reserve the IP address of 192.168.0.2 for your "real" modem's WAN port MAC address). Now when you plug your real modem into the Sagemcom it's WAN IP address will always be 192.168.0.2 (but if you plug it into a different network with a different sub-net it will still work OK - much better than setting a fixed IP address in the "real" modem) Set the DMZ address in the Sagemcom modem to be 192.168.0.2 (Advanced Setup / NAT / DMZ Host) Now (almost) all network traffic should automatically go through to your "real" modem with no firewall issues from the Sagemcom modem In my case my modem of choice is a Fritzbox because it has better quality WiFi, it is more open with many more options AND it has a built in DECT phone base station. So I also connect the home phone socket on the Sagemcom modem to the phone input socket on the Fritzbox modem. The end result of this is that almost all of the functionality of the Fritzbox modem is now available as if it was the only modem/router in my setup - including the VOIP phone line being accessible from my DECT phones. The disadvantages? I am running two modem/routers with extra cabling which add extra failure points to my system I am wasting power because I am running the Sagemcom modem when I don't really want to do so. I have to have an extra power point. I had to supply an extra short network cable and an extra short phone cable between the two devices.
