Connecting a router behind a modem (2nd WiFi network)

Question

Hello,  I installed my Linksys WRT54GS (1.0) on my LiveBox Play to get internet via WIFI in a corner of my garden where the LiveBox signal did not reach at all. I searched for a while and found all sorts of solutions, even installing Linux instead of the router's firmware (not a bad idea) when I was looking for a simple solution.  I finally found the right configuration (solution) for my project and I am sharing it with you in this pseudo-tutorial. Anyone is welcome to improve these lines as they see fit.  The simplest way to configure it is to have one computer connected to the Box (either wired or wifi) and one connected to the router (wired), as well as a smartphone (or other device) intended for the router's WIFI for testing.  The Ethernet cable connecting the Box to the router should be plugged into a regular port on the Box and into one of the "regular" lan ports of the Linksys.  To configure on the LiveBox Play: Nothing  -> Check the DHCP range in advanced configuration / DHCP tab  - Enable DHCP - Box IP address: 192.168.1.1 - Subnet mask: 255.255.255.0 - Starting IP address: 192.168.1.2* - Ending IP address: 192.168.1.150*   To configure on the router:  -> In Configuration / basic Configuration tab  Internet section (Ethernet port where the Box is connected): Static IP configuration  - Router network LAN address: 192.168.1.200 - Subnet mask: 255.255.255.0 - Gateway (Box): nothing - DNS (Box in this case): nothing We choose 1.200 outside the Box's DHCP range and verify that it is not used in the network...  disable the DHCP server on the Linksys LAN  WIFI section:  - Configure normally  Connect the Linksys (or other router) to the LiveBox (or other box) through one of its LAN ports to one of the LAN ports of the box. The WAN port of the "router" will remain unused.  The Linksys will no longer act as a router, but as a simple switch/WIFI access point.  PCs will receive addresses in the Box's network (192.168.1.0/24). The Box is still manageable at http://192.168.1.1 and the Linksys at http://192.168.1.200   Configuration: Windows 7 / Firefox 38.0

JazzyOntheRock · Accepted Answer

Hello,  Would any of you have an hour of your time to clean up my first message with the information provided afterwards? I won't be touching my network for several days (no need for sharing between computers) but it would be good to offer a simple and clear tutorial for those who might come across this page during their research.  Thanks for them ;)  -- France is a dictatorship ruled by corrupt, lying, thieving, murdering, and pedophile politicians reigning over a population even more ignorant than it is uneducated...

phil2k · Answer

Hello  - Enable DHCP - Box IP Address: 192.168.1.1 - Subnet Mask: 255.255.255.0 - Starting IP Address: 192.168.1.2* - Ending IP Address: 192.168.1.150* - Assign a static IP address to your router ²: 192.168.1.2 - The choice of 2 to 150 is arbitrary; the only requirement is that it must accommodate the fixed IP address of the router and everything you have connected to your box (wired and wireless).  One correction to be made: since you are giving the router a fixed address, 192.168.1.2, you must exclude this address from the DHCP pool  As for the rest, that seems correct ..  If you want to put everyone on the same network: You connect the cable to the router on a LAN port. You assign an address to the router on the LAN, 192.168.1.2 (you change the WAN address, it will not be used). You disable DHCP on the router. Everyone will be on the same network, for example, to simplify access to a NAS .....   -- "To fix something that doesn't work or makes too much noise, all it takes is to hit it with something that works better or makes more noise" The Shadoks

Danelectro · Answer

Funny, I did exactly the same thing last year: a WRT54GL with dd-wrt behind a fiber Livebox. I wish I had come across this tutorial back then!

pruvieros · Answer

I would like to develop here the second part of your post, which was not without difficulty with my Zyxel Zywall USG 20W router. Indeed, I had to create a bridge between the LAN and WLAN interfaces of my router. I started from the following article: http://kb.zyxel.com/KB/searchArticle!viewDetail.action?articleOid=010542&lang=EN  My router has LAN ports and a WLAN port that I will use, and a WAN port that I will not use.  My box is at 192.168.1.1 (with DHCP)  1- I set the LAN interface of my router to 192.168.1.2, without DHCP. The box is connected to one of the LAN ports 2- I set the WLAN interface (that is, wifi) to 192.168.1.3, without DHCP, with a WPA-PSK security level (only a key needs to be specified) But it doesn't work: my wifi PCs see the wifi router but cannot access the internet 3- Finally, I need to create a bridge (there's a tab for this) between the LAN interface and the WLAN interface. Thus, wifi PCs can pass through the router from the WLAN interface to the LAN interface, and access the box. The bridge will be called br0, and its members will be WLAN (called wlan-1-1 on my end) and LAN (lan1 on my end). We assign this bridge the IP address 192.168.1.4, without DHCP. It is now through this address that we will connect to the router for administration.

Connecting a router behind a modem (2nd WiFi network)

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