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Share wireless internet, but not wired network

Discussion in 'General Discussion' started by Anonymous, May 28, 2005.

  1. Anonymous

    Anonymous Guest

    I am sure this has been addressed, but I don't know what to terms to search for (bridge, gateway, router, etc.). I have had a BEFSR41 installed and working with my broadband modem and other wired devices without problems.

    I have just purchased a WRT54G and would like to configure it to allow wireless access to the Internet only, not to other devices on the wired network. I would also like to leave the modem connected to the WAN port on the BEFSR41.

    What is the correct way to setup the WRT54G, so wireless devices will be able to access the Internet, but not have access to the wired devices connected to the BEFSR41?

    Thanks, Libs
     
  2. sahirs

    sahirs Network Guru Member

    Connect the modem to the WRT54G.
    Connect the BEFSR41 to one of the LAN ports on the WRT54G.

    Use one of the 3rd party firmwares (Talisman, for example) to set up two VLANs - one for the wired port (BEFSR41 network) and other for the wireless network.
     
  3. CAOgdin

    CAOgdin Network Guru Member

    Using Two Routers, Use Different Subnets

    I recently had to add a WRT54GS to an existing restaurant network, so patrons could access the Internet as a hotspot, but without access to each other's computers, and certainly no access to the restaurant's computers.

    The BEFSR81 is already the DSL router for the restaurant, with all computers tied to that Ethernet switch. All clients are configured for DHCP (e.g., in the range 192.168.1.100-thru-110).

    I plugged the WRT54GS' WAN port into the BEFSR81 in the following way:
    Assign a Static IP address to the WRT54GS (say, 192,168.1.200). Then, configure the BEFSR81 DMZ port to the same IP address. That isolates that single IP address as providing service by the BEFSR81 to the WRT54GS.

    Next, in the WRT54GS, configure DHCP for a different range (e.g., 192.168.1.192-thru-199) with a very narrow netmask (e.g., 255.255.255.248) for up to six wireless clients. Now the wireless users are in one address space, the rest of the network is in a different space, and because we're using non-routable addresses, it takes a LOT of work for anyone to get into the main restaurant network.

    Finally, went to wireless/Advanced Wireless settings and set "AP Isolation" on, to keep wireless clients from probing each other's computers.

    The only complication to this is that in order to administer the network, you have to plug the computer directly into the back of the specific router, and configure that computer for an IP address within the range.

    Be sure you DON'T connect the two routers with any LAN cable, except the one from the BEFSR81 and the WAN-input port of the WRT54GS.

    This seems to work effectively with both HyperWRT 2.1b1, and Linksys stock software.
     
  4. Anonymous

    Anonymous Guest

    Re: Using Two Routers, Use Different Subnets

    Thanks for the response, it certainly sounds like what I want.
    Let me give you the detailed settings I tried based on what you indicated, but because I am not familiar with subnets and DMZ I am probably missing something obvious to you.

    BEFSR41 (wired network)
    -- Setup / LAN IP Address
    -- -- 192.168.1.1 (Device IP Address)
    -- -- 255.255.255.0 (Subnet Mask)
    -- Advanced / DMZ Host
    -- -- DMZ Host IP Address 192.168.1.200

    WRT54G (wireless network)
    -- Basic Setup / Internet Setup
    -- -- Static IP 192.168.1.200
    -- -- Subnet Mask 255.255.255.0
    -- -- Gateway 192.168.1.1
    -- Basic Setup / Network
    -- -- Local IP Address 192.168.1.201
    -- -- Subnet Mask 255.255.255.248

    Network cables run as follows:
    broadband modem --- BEFSR41 (WAN) / BEFSR41 port 3 --- WRT54G Internet port

    My problem is that I am still able to see the computers on the wired (BEFS41) network when connected to the WRT54G, not just the Internet.
     
  5. bluedog

    bluedog Network Guru Member

    try assigning your WRT54G an ip like 192.168.1.200
    Then set the internal ip at 192.168.2.100
    That will make your 54g clients on a different subnet and I believe they won't be able to access computers with the 192.168.1.XXX numbers.

    Others please correct me if I am wrong.... I don't use this setup so I am not 100% sure.. But I believe I have seen this posted many times.

    BD
     
  6. Anonymous

    Anonymous Guest

    Re: bluedog's suggestion

    I tried your suggestion, and I am still able to see the devices connected to the BEFSR41 while connected to the WRT54G.

    I am not sure if I should be changing any other settings on the WRT54G (eg. router/gateway mode)?

    I have reset the WRT54G back to Linksys defaults, and only changed the settings on the main setup page.

    BEFSR41 (wired network)
    -- Setup / LAN IP Address
    -- -- 192.168.1.1 (Device IP Address)
    -- -- 255.255.255.0 (Subnet Mask)
    -- Advanced / DMZ Host
    -- -- DMZ Host IP Address 192.168.1.200

    WRT54G (wireless network)
    -- Basic Setup / Internet Setup
    -- -- Static IP 192.168.1.200
    -- -- Subnet Mask 255.255.255.0
    -- -- Gateway 192.168.1.1
    -- Basic Setup / Network
    -- -- Local IP Address 192.168.3.201
    -- -- Subnet Mask 255.255.255.248

    Network cables run as follows:
    broadband modem --- BEFSR41 (WAN) / BEFSR41 port 3 --- WRT54G Internet port

    I did not think your 191.168.1.xxx and 192.168.2.xxx would allow me to access the Internet, but it did, with the same problem.

    My problem is that I am still able to see the computers on the wired (BEFS41) network when connected to the WRT54G, not just the Internet.

    Thanks, Libs
     
  7. almond_23

    almond_23 Network Guru Member

    It's easy actually. Just hook up the wireless router to a computer and change the lan ip to something like 192.168.1.2 then disable the dhcp server then that's it. Just connect a cable coming from the numbered port of the befsr41 to the internet/wan port on the wireless router.
     

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