Help with configuring a WRTSL54GS to work behind another router.

Discussion in 'Cisco/Linksys Wireless Routers' started by ka9yhd, Feb 14, 2007.

  1. ka9yhd

    ka9yhd LI Guru Member

    Please bear with me for the rather long explaination of what and why I am doing this.

    I am having problems with the connection to my ISP going down randomly. When I had the "SL" connected to the modem and configured for PPPoE the Sl will not connect. If I connect a computer directly to the modem and configure the computer for PPPoE it connects.
    Last week a tech from my ISP came out and brought with him a Broadxent Brite Port 8120 ADSL Gateway. Which is a modem/ router that is configured to do the PPPoE negotiations. The Broadxent also has problems with random disconnects.

    I had configured the "SL" to work behind the Broadxent gateway by setting the "SL" to DHCP and changing the DHCP server from to it connects and I have access to the Internet.

    Now I have decided that I do not want to pay for that Broadxent gateway and I want to use the Zoom ADSL modem and my old wired router. Which is a spare PC with two ethernet cards in it and running a Linux firewall/ router application. This router works great and I have access to the Internet.
    The problem is that the "SL" will obtain an IP address from the wired router but I can not get a connection to the Internet with my laptop through the SL.

    How do I configure the WRTSL54GS to work as an access point?

    Relax.... I am in the process of switching ISP's because everytime that I contact them about the line going down, they blame it on the Linksys. Because the line works with a computer connected directly to the modem.
    Also I can get a wireless 10 megabit service for less then I am paying for their 1.5 meg/ 384k DSL line.
  2. eric_stewart

    eric_stewart Super Moderator Staff Member Member

    Turn off DHCP server on your router and connect any port on the built-in 4-port switch (vs. WAN) to the LAN side of your Linux firewall. Now when wireless workstations associate to your Linksys they will obtain their IP address from the Linux firewall.

    Sidebar: PPPoE has always been an issue with the standard Linksys firmware, at least on the WRTxxx series That's why 3rd-party firmwares such as Thibor, Tomato and DD-WRT (among others) ditch Linksys' PPPoE module out-of-hand and substitute another.

  3. ka9yhd

    ka9yhd LI Guru Member

    Thank you that worked.
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