Getting into my network using DMZ?

Discussion in 'Networking Issues' started by escape, May 16, 2006.

  1. escape

    escape LI Guru Member

    I have a cable modem and a Linksys Wireless-B Router which connects 2 PCs and a networks storage device. I'm trying to make the networks storage device available to the Internet via DMZ, however it is not clear how one would access the storage device.

    Inspection of my Linksys Control panel (IP, DHCP tab)
    enables me to view the DHCP Clients Table. This table clearly shows all the LAN clients and their assigned IP address. Using this lookup table I enter the IP address of the storage device ( into my web browser and can view the storage device's admin control panel. Since the network storage device is a web server this is the expected response I should get.

    Now where I get confused is how to I expose the storage device to the internet. I assume that if I set the DMZ Host IP Address to that of the the network storage device ( and click Apply, the storage device should be exposed to the internet.

    My question then is, what IP access would internet users need to access the storage device's admin control panel? Granted I'm not going to make the storage device's admin control panel generally available, I just want to go outside my LAN and try to get in. But what IP do I use?

    I can determine my IP address from the Linksys Control panel Status, but I'm not sure how that helps me get to the storage device.

    Any guidance will be appreciated,
  2. sufrano63

    sufrano63 Network Guru Member

    I would not advise you go that route. Putting anything outside the DMZ is an open invitation to hackers. I have a NAS NSLU2 from Linksys with a built-in ftp server. Forward port 21 on your router and use ftp client to connect to your NAS.
  3. escape

    escape LI Guru Member

    As I said:
    I'm just tyring to figure out how DMZ and port forwarding works.

    First step: What is the IP address I would type into my browser, from outside my LAN to access my network storage admin control panel?
  4. sufrano63

    sufrano63 Network Guru Member

    The IP address you would type in would be your ISP assigned IP address.
  5. escape

    escape LI Guru Member

    I assume that is the IP address revealed from my Linksys control panel:

  6. kg4mrv

    kg4mrv Network Guru Member

    Go to the linksys "status" tab look for the IP address under the "Internet" category this is the address you will need to use remotely(this is your public IP).

    Also, you will need to assign the storage device a static "private address(ie 192.168.x.x)" as it may not always get assigned the same address. DHCP will renew the lease as long as it stays connected but if it gets disconnected any time it will likely get a different address. As a matter of fact that address may even get assigned to a computer in your network, leaving it open to the wild.

    I agree w/ sufrano63; depending on what services are available on the storage device this could be used sort of like a "proxy" in a way, since local traffic is usually not filtered by many firewalls. They could connect to this device and then from there to the rest of your network. Although this is not likely w/ a simple NAS device.
  7. escape

    escape LI Guru Member

    OK, I put my network storage device's private address in the DMZ, then tired to access my public IP, outside the LAN, but got a browser error "The page cannot be found".

    There must be more to this, so I'm still at a loss?
  8. r00t

    r00t Guest

    you need to know the Public Ip address of your Device , how ca do this just simple navigate to and that ip its from your device, keep in mind what your isp can use a firewall to blocks portsso you need to know or say to th device what listen on determinate port, so to check if your isp doesnt use a proxy to assign IP,
  9. escape

    escape LI Guru Member

    The public IP revealed by is the same as that displayed in the Linksys admin control panel.

    I have confirmed my internet service provider does NOT block ports.
  10. tay829

    tay829 LI Guru Member

    I would have to agree that DMZ is a bad way to go, especially if you are not that learned in what DMZ does or how it works.

    I would go with the ftp recommendation or you could try using a DNS forwarding service to the IP of your NAS.
  11. escape

    escape LI Guru Member

    Thanks for warnings on DMZ and I am fully aware of the risks BUT am using it to TEMPORARLY figure this out. FTP will come after.

    With regards to the situation, I put the storage device in the DMZ, then try to access my public IP. The web browser displays the error that it cannot find the IP. So I am left wondering about the public IP.

    It is established by my service provder via DHCP so trying to access it might be the problem???
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