my computers cant access the internet due to a failed dns

April 28, 2012 at 14:58:32
Specs: Linux

All three of my computers and xbox can connect to the internet wirelessly but can't go on sites due to a failed dns lookup. I've tried going and setting it to googles dns resetting my router but nothing works! Any ideas?

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#1
April 28, 2012 at 15:55:34

The only thing I can think of that would cause that for all your computers and the xbox is the settings in the router's configuration have been set WRONG !

Did you change settings in your router's configuration just before this first happened ?
....

Your wireless adapters indicating they're working fine in the operating system DOES NOT necessarily indicate they're connecting to the router wirelessly.
If they're NOT connecting to the router wirelessly, you CANNOT access the internet from that computer wirelessly via the router.
......

You Resetting the router has deleted all the custom configuration settings in it's configuration. You are essentially starting over from scratch regarding your wireless settings in that configuration.

Re-setting the router's settings sets them to defaults, HOWEVER.....

- some wireless routers have the wireless feature DISABLED by default in it's configuration.
In that case, the led that indicates the wireless feature is enabled will be OFF on the front of the router after you have reset the router to defaults.
If that led is OFF, you must connect a network cable between a computer's wired network adapter and the router to access the router to ENABLE that.

- you WILL NOT be able to connect from any computer or the xbox wirelessly to the router until you have set up the wireless Security settings in the router's configuration to be compatible with the wireless settings of all the wireless adapters for the computers and the xbox.

The code or password MUST be the same, and the type of Security used MUST be the same or be compatible.
The wireless adapter's security settings on each computer and the xbox must be the same or be compatible, and those must be the same as, or compatible with, the wireless settings in the router's configuration.

- the default settings otherwise regarding the way the router connects to your ISP (Internet Service Provider) may NOT be the settings you need to use.
E.g. some ISPs require a Dynamic connection, some must use some other way.
....

I know how to fix your problem quite easily in Windows but not in Linux.

Assuming the default settings otherwise regarding the way the router connects to your ISP (Internet Service Provider) ARE the settings you need to use......
(If they ARE, connecting a network cable between any computer's wired network adapter. that has had the drivers installed for it and is enabled, and the router, will probably allow that computer to access the internet fine.You may need to Restart the computer for that to work.)

You need to determine the type of security being used and the code or password for that.

It's a lot less work in this case to find the wireless security settings that were successfully used before and use those.

On any one of the computers that could access the internet fine previously via the same router, you need to find those existing wireless security settings, and copy them down..

Once you have found that, access your router by using a network cable to connect to it between the computer's wired network adapter and the router.

The default URL address - 192.168.xxx.xxx - you need to type in your internet browser program to access the router (internally), and the default user name and password you need to provide at that screen to be able to change settings in the router's configuration, are in the manual for your specific router model, for the specific revision or version of it if that applies.
If the router - or combo router / high speed modem - was provided to you by your ISP, any of those three things may be different than in the generic manual for the same model You may need to go to the ISP's web site and look up those settings on their site in the support for the router, or combo router / high speed modem, you're using. .


Make the wireless security settings in the router's - or combo router / high speed modem's - configuration settings the same as the settings you copied down, or compatible with those settings, Save settings in the router's configuration.

Disconnect the network cable that was between the computer's wired network adapter and the router.

You may need to Restart all the computers that are going to be connected to the router wirelessly, and power off / power on the xbox, in order for them to be able to connect to the router wirelessly. .

If you have set the security settings in the router's configuration correctly, everything that could use the internet fine before should be able to connect wireless via the router to the internet.
.....

If you are able to do those things and that doesn't help, you need to
- tell us the make, model, and revision or version if that applies, of the router or combo router / high speed modem you're using,
- tell us whether it was provided to you by the ISP.
- tell us what your ISP is .


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#2
April 28, 2012 at 20:00:52

So you set the google dns in your router? I would say CMD then ipconfig /flushdns but it is strange that your XBOX cannot resolve DNS.

Can you bypass your router and plug directly into your modem and see if it works there?


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