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need help: to have loopback within LAN

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  • need help: to have loopback within LAN

    I recently purchased and installed a Netgear FVG318 router. My system is:
    Win2k Server
    Compac Proliant Server
    AlphaV5 v9

    I had a Linksys router and it recently broke. So I replaced it with the above mentioned Netgear router. Now I'm having a problem with not being able to access my webpages from within my LAN. I know they work because I can see them outside of my LAN.

    FYI, I did realize that I can access my page within my LAN at: http://localhost/ but when I type my domain in the browser, the netgear router login shows up.

    I have researched the web and also this forum and found a comment at

    He mentioned a loopback problem. I contacted Netgear and they mentioned that my router doesn't have loopback built into it.

    I read that I can modify my "host" file located at:

    This is what is in this file:

    # Copyright (c) 1993-1999 Microsoft Corp.
    # This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
    # This file contains the mappings of IP addresses to host names. Each
    # entry should be kept on an individual line. The IP address should
    # be placed in the first column followed by the corresponding host name.
    # The IP address and the host name should be separated by at least one
    # space.
    # Additionally, comments (such as these) may be inserted on individual
    # lines or following the machine name denoted by a '#' symbol.
    # J:\alpha5\local\A5webroot
    # For example:
    # # source server
    # # x client host localhost
    What would I modify in this file?

    I read an article at:

    Within my Netgear Router program, I know that my Lan IP is

    I searched on my server for the "hosts" file and found a recently updated "hosts.tmp" file located at:
    C:\Program Files\DNSexit IP Updater

    All that is in this file is my domain that points to this server ex:

    any suggestions? Thanks in advance.

  • #2
    Re: need help: to have loopback within LAN

    Your router has an ip address for the outside world (like and each of your computers on the lan has an inside address (like 192.168.x.x) which the router uses to find a computer. You can find the outside address from If you want to access another computer on your own lan you can not use the outside ip address of you router but must use the inside address. This is true even if you use port forwarding on the router. I have a web-cam server on my network and a public address ( But if I want to use the camera from inside my home I have to use the actual local ip address (like 192.168.x.x). So find out what the ip address of the computer you want to access is. You can use ipconfig on a win system to find this. As you discovered if you use the public ip address of your router from inside you get to the router configuration server not to any computer on your network.


    • #3
      Re: need help: to have loopback within LAN

      Irwin, thanks, yes I found that machines IP within my LAN by Start/run/cmd
      then typed: ipconfig/all

      yes, now I can login to that machine from another machine from within my LAN. I remember that, but guess I forgot

      Thanks for the help.


      • #4
        Re: need help: to have loopback within LAN

        One thing you might consider. The machine that has the Web App Server should probably have a static IP assigned to it. Why, because the router (assuming you DHCP running on it) will assign dynamic IP addresses to the machines on your local network. That means that if you reboot the router and/or any of the computers you may not get the same IP address assigned to it. So what may work today may not work next week or next month.

        The computer that runs my Web App Server has a static IP assigned to it, . I have the router setup for port forwarding so that web requests on port 80 (web pages) are all directed to that ip address. So if the router gets restarted, the server or any work stations, the server will always be the same.
        Note: I had the router change the assigned ip address range from the usual to assign everything in the range. If you add other peripherals, there are sometimes conflicts. This helps to resolve that.

        Mike Reed
        Phoenix, AZ