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Laptop connect to home wireles network but there is no internet access and this is cause of DNS server isn't responding.

This is my situation, lately i have problem with my laptop. i can connect to my home wireless network but there is no internet access. when i try to troubleshoot my wireless network, the result is "DNS server isn't reponding". So i try to search at web regarding my problem and i found this/your website (www.instructables.com) and there is a question similar with my problem and the way to handle it. so what i do is i change my preferred and alternate DNS server to 8.8.8.8 and 8.8.4.4. after that i try to reconnect to my home wireless network once again and it's totally working! I'm so happy! Thank you! :D

So my question right now is, what is the main cause to my problem until i must change my DNS server to 8.8.8.8 and 8.8.4.4?

Vyger3 years ago
DNS (domain name server) is like a telephone book. It converts the names of web sites you type in into numbers that the internet understands. Most service providers have a DNS listing of sorts and that is usually the default but there are a number of super high speed ones that you can set your settings to that do the job faster and more reliably.
The one I use is 208.67.222.222 and 208.67.220.220

The DNS servers are all linked together and constantly recheck the numbers they have with each other. This way if one of them gets hacked the others will detect the numbers being wrong and they will reset them. This prevents you from being redirected from a legit web site to a counterfeit one. So for instance your bank has a web site where you can do on line banking. Someone creates a web site that looks just like it and manages to get the DNS number changed so when you type in the name of your bank it takes you to their web site instead of yours. You then enter in all your information thinking that you are on your banks web site but you are not. The DNS server network helps prevent this from happening. There are some viruses that are called DNS redirectors. These will change the DNS numbers on your computer so you are redirected to their own servers which then will give you the wrong web sites. This is why you should use a number that is legit and that you recognize so if things are working weird you can check your numbers to make sure your computer has not been hijacked.
dong yul (author)  Vyger3 years ago
Hello,thanks for your respond and you have answer to my question very well. i have another question or situation regarding to this problem. i hope you can help me by answer it..

my situation:

lately, my brother have bought like an antenna and it will plugged in to his laptop. the main function of this tool is to boost up or strenghten all available home wireless network at my neighborhood and can connect all available network by hacking the password. my brother use this antenna just because of he want to make the line more faster and can download more faster than usual download.

All home wireless network has its own DNS number or setting right. So if all my family member connect to our home wireless network, we will automatically connect to a default DNS server right. regarding to your answer before, if someone hacking my home wireless home network, me and my family will detect it the number being wrong right. why i mention hacking is because of the tool(antenna) that my brother already bought. i realize when he plugged in to his laptop and connect to our hime wireless network, only he can connect to the internet while all my family cannot connect and will faced a problem where the DNS server isn't responding. But when he unplugged that tool, all back to normal.

i want to ask you, is this the main reason why i and my family member can't access internet while my brother can access?
Vyger dong yul3 years ago
In addition to you assigning your computer a DNS number you can also assign the number in your router for your router to assign to all the computers connected to it. . So from what you have said it is your router that has the wrong DNS number.
The way it works is if you assign your DNS number in your computer YOUR computer will use that number and ignore everything else. You override all the automatic settings. But, If you set it to automatic it will ASK the router for the number and it will use whatever number the router gives it. If the router has the wrong number it will give the wrong number to every computer that asks it. But if you have given a proper number to your computer it will not take the number from the router so the internet for that computer will work while all the others will not.
You need to change the number in your router. If it is your router you should have a CD that came with it and that will explain to you how to do it. It is pretty easy once you log on to the router.
To get the number to log on to look in your computers network settings for the "gateway" number. It will have the same format as the DNS number. The number will likely be something like 192.168.10.1 , the last number, 1 , is always the gateway designation. Your computer will have a number like 192.168.10.15 with the last set of numbers assigned by the router. Every computer on your network will have a different last set of numbers.
Open your web browser and type into the address bar the gateway number. This will allow you to log on to your router. It should give you a screen that identifies the router and asks you for the user name and password. If it is your router you should know the password.
After you log on you will find a screen somewhere in the settings that is for DNS. If you set the router DNS to automatic it will pass on the request for DNS numbers to your ISP. But if you put in a DNS number like the High Speed number I mentioned above the router will not ask but will instead link directly to those DNS servers. Then every computer on your network will be given the proper addresses because the router gets them directly from the DNS servers.
SO, change the number in your router and everything will work OK.

As far as knowing who is on your network, your router knows. It keeps a log of every computer that logs on to it. It will also show the MAC number of every computer that has been connected to it. If there is a computer in that list that is not one of yours you can put the MAC number into the exclusion list and it will then block that specific computer from connecting to it.

Lastly, having a longer range antenna will usually get you a better signal. I have one that has a pretty good range. But it will not make the internet speed faster. It will only go as fast as what the wireless is set up for. So it is bandwidth that determines the speed of the connection and not signal strength. If your brother gets noticed and they lock out his MAC number knowing the password will not do him any good. That router will in effect BAN him from ever logging on to it.

It's all a matter of the settings on your laptop. Sounds like the laptop was set to use some odd DNS server rather than auto detecting the preferred DNS server that your ISP uses.