How to change DNS in your TCP/IP configuration –

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It may be that, in an extraordinary way, you have detected at some point that access to your website has been interrupted even though the servers of your hosting provider are working normally.

It may be due to the fact that some network providers see their connectivity at the DNS level affected, thus presenting some specific incidents that affect the visibility of your page.

In this article we will see how to know if you cannot see your website because it does not resolve your domain and how to modify the DNS in your network configuration for those of Google to solve it.

My domain doesn’t resolve and I can’t see my website

To find out if your domain does not resolve and that is the reason why you cannot see your website, access your page from the browser and check if a message like this is displayed:

This site can’t be reached (***) server IP address could not be found. DNS_PROBE_FINISHED_NXDOMAIN

To make sure that your website is really having a connectivity problem that affects your network, we recommend you use the tool: .

Its operation is very simple:

• Enter the name of the web domain in the box that says “example.com”.
• You press the “Go!” button.
• You check if the web is viewed from different locations.

With this tool you will be able to confirm if users who use other internet providers not affected, can see your accessible page.

How do I solve it?

You may set up another set of different numbers (DNS) and you will see your website, email accounts, etc. without any problem.

In the next section we will explain how to change this setting to call google dns instead of those of your internet provider (this is called TCP/IP configuration).

How to modify the DNS in your network configuration?

Google’s public DNS are prepared to resolve quickly, giving one more alternative to resolve your domain names. Google’s DNS addresses are:

REMEMBER!

The DNS to change are those of your equipment (on your computer), you should not change the DNS of your domain.

To ensure that the DNS change is successful, configure both Google DNS addresses. That is, it uses one for the primary address and the other for the secondary address.

Let’s see now, what steps to take to correctly change the DNS in your network configuration for Google’s public onesdepending on the operating system your computer has.

Before continuing… an important notice.

The most common is that you have this configuration set to “automatic”, so that you can put the Google values ​​​​and remove them when you consider appropriate, without additional considerations.

If when you get to the configuration window, which I will explain below), you discover that you already have some values ​​configured (the fields appear with data already included), it is It is HIGHLY recommended that you save them before making the change to be able to leave everything as it was when your internet provider works well again.

We recommend, in that case, save these values ​​that you are going to modify in a safe place. A good option is to use the Secure Notes of our tool.

What if you don’t want to use Google’s DNS?

Don’t worry, you have other alternatives:

OpenDNS

• 208.67.220.220
• 208.67.222.222

cloudflare

Modify DNS on different operating systems

At this point, let’s see how to correctly change the DNS in your network configuration to Google’s public ones, depending on the operating system your computer has.

Windows 7, 8.1 and 10

• click on Start (lower left corner of the screen), and then Setting > Network and Internet > Wi-Fi (or Ethernet if you are connected by cable to the router).

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• Choose Manage known networkschoose the network you want to change settings for, and then select Properties.
• In IP assignment, select Edit.
• Under Edit IP Settings, select Automatic (DHCP) or Manual.
• When selecting Automatic (DHCP)the IP address and DNS server address settings are set automatically by the router or other access point (this is the recommended setting, but in this case we want to change it to manual).
• When selecting Manualyou can manually configure the IP address and DNS server address settings.
• Under Edit IP settings, choose Manual and then activate IPv4.
• To specify an IP addressin the IP Address, Subnet Prefix Length, and Gateway boxes, type the IP address settings.
• To specify a DNS server addressin the Preferred DNS and Alternate DNS boxes, type the addresses of the primary and secondary DNS servers.

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• When you’re done, click Save.

mac os x

• Click on the apple menu (little apple in the upper left corner), and select System preferences.

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• click on Net.
• Select the network connection you want to modify. It can be your Wi Fi connection, if it is the one you use, or your Ethernet connection if you go by cable. (If you use a password to protect the system, at this point you will have to click on the “padlock” in the lower corner, and authenticate yourself).

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• click on Advanced.
• Click on the tab .

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• Click on the plus symbol under the DNS Servers column
• Add the DNS server you want to use.
• press Enteror click the Plus symbol again to add another entry.
• The new DNS will be included at the bottom of the list, but you can drag them to the top to make them apply.
• When you’re done, click okayand finally in Apply.

Linux

• edit the file /etc/resolv.conf. You can open it with some text editing utility or, from the terminal: nano /etc/resolv.conf.
• In this file you will see the DNS information (NameServers); change the IP’s that appear for the Google DNS
• Reboot the system and edit the file /etc/dhcp3/dhclient.conf adding at the end:
• supersede domain-name-servers XX.XX.XX.XX, YY.YY.YY.YY;
• (XX.XX.XX.XX is the primary DNS IP and YY.YY.YY.YY is the secondary one)
• Save the file.
• Make sure the changes have taken effect by running in a terminal: /etc/init.d/networking restart

Conclusions

The most important concept to stick with is that when you open a web page, or try to view your emails, there are three links that come into play:

• Your computer or mobile
• Your internet company.
• The server where that web page is hosted.

Fortunately, if any of the links fails, there are solutions, and if it is the central link (your internet provider), you can do something about it so that it does not prevent you from continuing to work with the server where your website and other services are hosted, as we have previously explained.

The mechanics by which you can access the internet and view a web page is a complex process but I hope I have been able to clarify how it works and solutions that you can apply in this regard.

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