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Windows 7: Can connect without a router; cant with

04 Feb 2013   #1

Windows7 64
 
 
Can connect without a router; cant with

Hi guys. Yesterday, all was fine. Today, I cant connect when either of my computers is plugged inot my router.

I have two computers, 1 is Vista, the other is a dual boot with Windows 7 and XP. Both are connected via a linksys wired router. I woke up this morning and cold not connect, and my Network And Sharing Center is telling me there is no connectivity.

If I plug the computer directly into the modem AND change the TCP/IP settings to obtain ip address and dns server auto, then I can connect. This is true of both the Windows 7 partition, and the XP partition. While still plugged into the router, I ran troubleshooting in Vista, and it told me that there was a problem with the DNS config.

My first thought thought is that the problem is the router, even tho all the lights are on, and I did try unplugging it (And as well the modem). Was wondering if anyone has any other suggestions as to anything I can try? Should I try accessing my linksys page (I forget how to do that) and see if there is anything there I can do?

Any ideas are welcome - thanks!


My System SpecsSystem Spec
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04 Feb 2013   #2

Windows 7 Ult, Windows 8.1 Pro,
 
 

Quote   Quote: Originally Posted by jasong1968 View Post
Hi guys. Yesterday, all was fine. Today, I cant connect when either of my computers is plugged inot my router.

I have two computers, 1 is Vista, the other is a dual boot with Windows 7 and XP. Both are connected via a linksys wired router. I woke up this morning and cold not connect, and my Network And Sharing Center is telling me there is no connectivity.

If I plug the computer directly into the modem AND change the TCP/IP settings to obtain ip address and dns server auto, then I can connect. This is true of both the Windows 7 partition, and the XP partition. While still plugged into the router, I ran troubleshooting in Vista, and it told me that there was a problem with the DNS config.

My first thought thought is that the problem is the router, even tho all the lights are on, and I did try unplugging it (And as well the modem). Was wondering if anyone has any other suggestions as to anything I can try? Should I try accessing my linksys page (I forget how to do that) and see if there is anything there I can do?

Any ideas are welcome - thanks!
I'd say that you definitely need to perform a reset on your router. There is usually a small button for this some place on the router.

The 30-30-30 Hard Reset Rule for Routers
My System SpecsSystem Spec
04 Feb 2013   #3

Windows7 64
 
 

Thanks for the response.

Using the 30 30 30 rule, I reset the router, but the problem stil exists.
My System SpecsSystem Spec
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04 Feb 2013   #4

Windows 7 Ult, Windows 8.1 Pro,
 
 

Quote   Quote: Originally Posted by jasong1968 View Post
Thanks for the response.

Using the 30 30 30 rule, I reset the router, but the problem stil exists.
Do you have two valid DNS server IP's typed into your routers set up page where it says DNS servers?


If you can post a screen shot of the ipconfig/all from this machine it might be helpful.
My System SpecsSystem Spec
05 Feb 2013   #5

Windows7 64
 
 

Quote   Quote: Originally Posted by chev65 View Post
Do you have two valid DNS server IP's typed into your routers set up page where it says DNS servers?
Eh, I accessed the router page, cant seem to find the routers set up page where it says DNS servers....
My System SpecsSystem Spec
05 Feb 2013   #6

Windows 7 Ult, Windows 8.1 Pro,
 
 

Quote   Quote: Originally Posted by jasong1968 View Post
Quote   Quote: Originally Posted by chev65 View Post
Do you have two valid DNS server IP's typed into your routers set up page where it says DNS servers?
Eh, I accessed the router page, cant seem to find the routers set up page where it says DNS servers....
It's there somewhere but the user interfaces are all different for routers.

But you can also type the DNS server IP's into your IPv4 properties. Link below shows how to add Google's DSN servers to your Ipv4 properties.

How To Add Google Public DNS In Windows 7 - Speed Up Web Browsing | The Tech Journal
My System SpecsSystem Spec
05 Feb 2013   #7

Windows 7 64bit
 
 

Hi jasong1968,

Please share some more details for a better understanding:

- Make / Model of the router that is in use
- Is it deriving 'Internet' from a 'Modem'? If yes, please check and share the 'Port number' (on the router) where cable from the modem is plugged in. You may also try plugging the 'Modem cable' into each of the computers one by one to see if bypassing the router works for you (for diagnosis)
- Also ensure that the 'Input cable' from the 'Internet Service Provider' is plugged into the 'modem' properly. You may try re-seating it.
- Also share if the 'connection' is a 'DSL / Cable Internet'
- What steps did you take to 'setup the router' after you 'reset it'?
- As suggested by 'chev65', results of 'IPconfig /all' may offer information that is more conclusive

Do reply with the findings. Would be glad to assist.

My System SpecsSystem Spec
05 Feb 2013   #8

Windows7 64
 
 

Quote   Quote: Originally Posted by chev65 View Post
But you can also type the DNS server IP's into your IPv4 properties. Link below shows how to add Google's DSN servers to your Ipv4 properties.
Yeah - I dont know about doing anything google related here. I just want to get this working back to the way it was. I never had anything google anywhere, and it all worked fine without it.

My adapter ip4, set to 'use following ip add' is:

IP address: 192.168.1.100
Subnet mask: 255.255.255.0
Default gateway: 192.168.1.1
Preferred DNS Server: 192.168.1.1

Here is my router DNS page:

Login Type: DHCP
Internet IP Address: 0.0.0.0
Subnet Mask: 255.255.255.0
Default Gateway: 0.0.0.0
Static DNS 1: 0.0.0.0
Static DNS 1: 0.0.0.0
Static DNS 1: 0.0.0.0
MTU: 1500

And from my local network page:

Local MAC Address: xx-xx-xx (an actual # is there, of course)
IP Address: 192.168.1.1
Subnet Mask: 255.255.255.0
DHCP Server: Enabled

I tried a DHCP Renew, but that didn't help. The 'Internet IP Address' is bugging me a bit here.

Saurabh - thanks for chiming in here.

Linksys BEFSR41, used with a cable (not DSL) modem. Computer > any router port, out into the cable modem. Yes, the cables are seated properly.

"What steps did you take to 'setup the router' after you 'reset it'?"

Uhh, none, actually. Do I need to do anything after a reset? As I stated above, I tried a DHCP Renew, but that's all I tried.

Oh yeah - I can connect to my other computer via the router; I can r/w to and from both. It's just the internet that's the issue.

I called Comcast, but they unfortunately do not man there internet tech support dept with qualified personnel. If I call up and ask the internet tech support rep if they know what a DNS server is and they say no, well, that's pretty bad.
My System SpecsSystem Spec
05 Feb 2013   #9

Windows 7 Ult, Windows 8.1 Pro,
 
 

That isn't the ipconfig/all which is what I need to see.

I would prefer an actual screen shot like this one.


Attached Thumbnails
Can connect without a router; cant with-ipconfig.png  
My System SpecsSystem Spec
05 Feb 2013   #10

Windows 8.1 Pro RTM x64
 
 

Try following the instructions here: Article

In particular, take note of the following (taken from the above article):
Quote:
NOTE: Most Cable Internet Service Providers (ISP) use Media Access Control (MAC) Address authentication to establish Internet connection to Internet subscribers. A MAC address is a unique identifier pre-assigned to the network adapter/s of the computer. When you connect a computer directly to the Cable modem, the Internet Service Provider (ISP) verifies if the MAC address is allowed to obtain Internet access. All routers also have a unique MAC address.

If this MAC address is not recognized by the Cable Internet Service Provider, you will not be able to share Internet connection using a router. To set up your Linksys router to work with a Cable ISP, you have to enable the MAC Address Clone feature using the router’s web-based setup page. This feature will allow your ISP to recognize the router as the computer with the registered MAC address.
My System SpecsSystem Spec
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