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Windows 7: please help! unidentified public network with invalid ip


27 May 2010   #1

windows 7
 
 
please help! unidentified public network with invalid ip

Hello this is my first time posting a thread on a forum site but here we go lol

I recently upgraded to windows 7 and everything was working perfect very impressed overall.
I have cable internet through comcast. I had my modem plugged into a wireless router then my desktop was directly connected to the router and internet was working fine. I decided to unplug my router because my roommate moved out so no more need of a wireless adapter, however since removing the wireless router I have no more internet connection. When I open up network and sharing it says I am connected to an unidentified public network but I have no connection. I called comcast they said everything looked good on their end. All the lights are on on the modem and all connections are secure. I tried running all the networking wizards and they all say windows could not determine the problem however one window said I had an invalid ip address? And another window said my modem or other connecting device has had an error how can this be when everything was working fine until the router was unplugged?
Please help


My System SpecsSystem Spec
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27 May 2010   #2

Windows 7 Pro 64bit build 7601 SP1
 
 

Did you power cycle the modem. Check your internet settings in windows Local Area Connections properties and make sure IPv4 is set to obtain IP address automatically. Go to cmd and type ipconfig /all a post it here too.
My System SpecsSystem Spec
27 May 2010   #3

Microsoft Community Contributor Award Recipient

Windows 8.1 Pro with Media Center
 
 

Hi Seanarice, welcome to the Seven Forums.

First, I recommend you reconnect your router. It's always better to connect through a router and a modem, than only a modem. A router is much more than just a device to split your connection to multiple computers, wired or wireless. This article tells you more, if you are interested in finding out more.

If you really insist of using only the modem, you have to set it up. When you still had your router connected, the information needed for you to be able to connect to your ISP Comcast and further to the Internet was stored in the router. Disconnecting it leaves the modem with no valid information on how and where to connect. The lights are on or blinking to show it's ready; it understands it's connected to the net, and to your computer, but does not know how to use this information.

Not knowing the make and model of your modem, call Comcast again and ask how to set up your connection. You have most probably received a setup CD with the modem, you could also start by running it on your computer and following instructions given on screen.

Hope this helps at least a bit. Come back if you have any more questions.

Kari
My System SpecsSystem Spec
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27 May 2010   #4

Windows 7 Ult, Windows 8.1 Pro,
 
 

Quote   Quote: Originally Posted by seanarice View Post
Hello this is my first time posting a thread on a forum site but here we go lol

I recently upgraded to windows 7 and everything was working perfect very impressed overall.
I have cable internet through comcast. I had my modem plugged into a wireless router then my desktop was directly connected to the router and internet was working fine. I decided to unplug my router because my roommate moved out so no more need of a wireless adapter, however since removing the wireless router I have no more internet connection. When I open up network and sharing it says I am connected to an unidentified public network but I have no connection. I called comcast they said everything looked good on their end. All the lights are on on the modem and all connections are secure. I tried running all the networking wizards and they all say windows could not determine the problem however one window said I had an invalid ip address? And another window said my modem or other connecting device has had an error how can this be when everything was working fine until the router was unplugged?
Please help
Sometimes a secondary default gateway is created when you change things around which can cause problems.

It's easy to fix by just entering the default gateway manually.

Just follow the link below.
Windows 7 Unidentified Network, Limited Access, No Internet Connection Problem Resolved
My System SpecsSystem Spec
27 May 2010   #5

windows 7
 
 

I have powered cycled the modem several times as well as the computer no luck and I don't have the router anymore I gave it to a friend who actually could use one.? I'm using my smart phone to post these so I cant post the ipconfig/all. How do I tell my modem how and where to send the info? I already called comcast the sent a signal to reset the modem and they said also all my connections and signals looked good on their end and when I got the modem from them I didn't get an instalation disk.
My System SpecsSystem Spec
27 May 2010   #6

Windows 7 Pro 64bit build 7601 SP1
 
 

What Kari said is definitely a good idea regarding leaving the router connected. Not only does it give you more connectivity options, but for future connections like if you have a phone with wifi or a laptop. Plus the router should have firewall for security. But if you must do you have the drivers for the modem and a usb connection to it? What brand and model is the modem? Also try to hard reset the modem. There should a little recessed button on the back. Hold that down for like 10 seconds and that should reset the modem.
My System SpecsSystem Spec
27 May 2010   #7

windows 7
 
 

What is a default gateway and how do edit it manually and what do I change it to?
My System SpecsSystem Spec
27 May 2010   #8

Windows 7 Ult, Windows 8.1 Pro,
 
 

Quote   Quote: Originally Posted by seanarice View Post
What is a default gateway and how do edit it manually and what do I change it to?
The directions for that are already in the link I posted. It's very easy to do this if you just follow the directions.
My System SpecsSystem Spec
28 May 2010   #9

windows 7
 
 

So I did ipconfig this is what it says

Ethernet adapter local area connection.:

Connection specific dns suffix . . . .:
Link local IPv6 address . . . . . . . . . .: fe80::adb7:7e66:7dc6:e05d%12
Autoconfiguration IPv4 address . . : 169.254.224.93
Subnet mask . . . . . . . . . . . . . . . . . . : 255.255.0.0
Default gateway . . . . . . . . . . . . . . . :

Tunnel adapter isatap. {6A64u3C9-C7E0-4185-9E9D-32761A3AC3F4} :
Media state . . . . . . . . . . . . . . . . . . . : media disconnected
Connection-specific DNS. Suffix . . . :

Tunneladapter local area connection* 11:
Media state . . . . . . . . . . . . . . . . . . . : media disconnected
Connection-specific DNS suffix . . . :
My System SpecsSystem Spec
28 May 2010   #10

windows 7
 
 

So as you can see there is no default gateway listed therfore I cannot manually enter it some where else
My System SpecsSystem Spec
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 please help! unidentified public network with invalid ip




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