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LAN problem

Discussion in 'Networking' started by king-stew, Apr 25, 2010.

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  1. king-stew

    king-stew Thread Starter

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    Jan 2, 2009
    Messages:
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    Hi all,

    I have a small LAN set up at home and today i upgraded one of computers to a new one. However this new computer wont connect to the LAN. The error i get is "limited or no connectivity". It is set to obtain IP address automatically but it still wont connect. The other 2 laptops are working fine and the old desktop runs fine. It just seems to be a setting on the new desktop thats a problem.

    Any ideas?
    Thanks.
     
  2. king-stew

    king-stew Thread Starter

    Joined:
    Jan 2, 2009
    Messages:
    10
    Here is the IPCONFIG:

    ____________________________________________

    IPCONFIG:

    Working laptop:



    Microsoft Windows XP [Version 5.1.2600]
    (C) Copyright 1985-2001 Microsoft Corp.

    C:\Documents and Settings\user>ipconfig /all

    Windows IP Configuration

    Host Name . . . . . . . . . . . . : STUART
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Unknown
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No
    DNS Suffix Search List. . . . . . : chello.ie

    Ethernet adapter Wireless Network Connection:

    Media State . . . . . . . . . . . : Media disconnected
    Description . . . . . . . . . . . : Intel(R) PRO/Wireless 3945ABG Networ
    k Connection
    Physical Address. . . . . . . . . : 00-1B-77-5D-B4-F1

    Ethernet adapter Local Area Connection 2:

    Connection-specific DNS Suffix . : chello.ie
    Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet
    Physical Address. . . . . . . . . : 00-1B-38-39-B0-B8
    Dhcp Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    IP Address. . . . . . . . . . . . : 79.97.50.188
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . . . . : 79.97.50.1
    DHCP Server . . . . . . . . . . . : 10.52.10.1
    DNS Servers . . . . . . . . . . . : 89.101.160.4
    89.101.160.5
    Lease Obtained. . . . . . . . . . : 25 April 2010 15:16:46
    Lease Expires . . . . . . . . . . : 28 April 2010 06:38:27

    C:\Documents and Settings\user>


    Broken Desktop:


    Windows IP Configuration

    Host Name . . . . . . . . . . . . : DOWNSTAIRS
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Unknown
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No


    Ethernet adapter Local Area Connection 2:


    Physical Address. . . . . . . . . : 00-1B-38-39-B0-B8
    Dhcp Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    IP Address. . . . . . . . . . . . : 169.254.169.192 (i assume this is the lad i bought the desktop off's IP address)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . . . . :

    __________________________________________
     
  3. JohnWill

    JohnWill Retired Moderator

    Joined:
    Oct 19, 2002
    Messages:
    106,418
    Your "working" desktop has a public IP address. That indicates you either have the router plugged in wrong, or you don't have a router.

    You need to make sure the modem is connected to the router using the WAN/Internet port and the workstations are connected to the LAN/Network ports on the router.
     
  4. king-stew

    king-stew Thread Starter

    Joined:
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    Messages:
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    Hi john, i dont have a router! all 3 computers go straight to a switch and then out to the internet. Just to be clear, the 3 computers work fine all at the same time, the only problem is when i switch desktop the new desktop doesnt work, the other 2 laptops are still working fine!

    So today i took all the settings from the old desktop (each seems to have its own IP address) and put them into the new desktop. It seems to connect to the LAN fine now but it still cant get onto the internet!

    any ideas?
     
  5. JohnWill

    JohnWill Retired Moderator

    Joined:
    Oct 19, 2002
    Messages:
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    If you are networking directly over the Internet as you seem to suggest, you have opened a security hole you can drive a truck through! I'm astonished you haven't been infected already, though I suspect it may well have already happened!
     
  6. king-stew

    king-stew Thread Starter

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    Messages:
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    Thanks john, im a bit new to networking so could you explain? Do you mean that I have file sharing on?
     
  7. JohnWill

    JohnWill Retired Moderator

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    You are opening common file sharing ports directly to the public Internet. This is a HUGE security hole!

    You need to have a router to isolate your local network from the Internet.
     
  8. king-stew

    king-stew Thread Starter

    Joined:
    Jan 2, 2009
    Messages:
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    Would putting a password on it fix the problem though?
     
  9. JohnWill

    JohnWill Retired Moderator

    Joined:
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    Messages:
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    No! You really don't want file sharing going out on the Internet, you are playing with fire!
     
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