DLink DSL-504 Firewall Config and firmware problems

Discussion in 'Windows Networking' started by Dan, Jan 7, 2004.

  1. Dan

    Dan Guest

    I've just bought a DLink DSL-504 router off ebay, and am having a lot of
    troubles with it. I've got it working with no firewall enabled - ie. I can
    use the internet on all computers on my home network. However, the
    interface for configuring the firewall is so un-intuitive! Has anyone any
    experience in setting this firewall up? I want to have everything blocked -
    except certain specified ports (for now, let's just say port 80), and only
    on a certain computer on the network. How would I do this? I found one
    example on the internet, but that has the subnet mask as 0,0,0,0 on some of
    the options. On my version, there is no 0,0,0,0 in the combobox.

    I've also tried downgrading the firmware to the version we use at work (the
    firewall page is completely different). But halfway through the firmware
    upload a popup box says "Upload Failed". I've tried various firmwares, and
    they all fail! Anyone experience this?

    Below is a link to a screenshot of the firewall configuration page. Ignore
    the values I've already put in - I was just playing around trying to get it
    to work.


    Thanks for any help with this, as it's driving me nuts! :eek:|

    Dan, Jan 7, 2004
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  2. Dan

    Shane G Guest

    Do you want to block outgoing access as well as incoming?

    If you only want to block incoming, I have found it better on the 504's to
    not use the Firewalling/Filtering at all and just set the DMZ IP address to
    a non-existent or unused address on you local LAN. The DMZ IP is under NAT
    Configuration and specifies the IP to send any unmatched traffic to.... so
    basically any traffic that is not defined in the Port Redirection area is
    sent to a non-existent IP and thus it show as stealth mode on the firewall
    checking programs I have used.

    For the web server you just setup port redirection for port 80 to the IP of
    your web server..

    If you do want to block outgoing as well, then you will first need to
    activate the firewalling/filtering (it is disabled in the screen shot you
    posted) and it also looks like you have mixed up the in and out names (not
    that it matters). Your source for incoming will be ANY ( and the
    destination will be your internal server IP. The source for outgoing will
    be your local LAN subnet (e.g. and the destination will be
    ANY (

    The Australian Dlink site has and example doco for Advanced Filtering (
    http://www.dlink.com.au/tech/drivers/files/routers/DSL-50x_Filter_Example_fw221.zip )

    Good luck.

    Shane G, Jan 14, 2004
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  3. Dan

    Dan Guest

    Hi, thanks for the info. I've got it all sorted now. The screenshot I
    posted was just to show the UI interface - so that people who didn't have
    the same router, but knew a lot about routers, would still be able to help.
    The values in there were just from me playing around, and I knew they didn't
    work (which is why it was disabled :eek:)). I see what you mean about it being
    simpler to use the DMZ option - I've got about 30 firewall rules set now!

    Thanks again,

    http://www.dlink.com.au/tech/drivers/files/routers/DSL-50x_Filter_Example_fw221.zip )
    Dan, Jan 14, 2004
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