DNS settings on Windows and Linux. How do I check the DNS settings?

In the current market for the reliability and security of the Internet connection, a wide variety of services are beginning to appear more and more often, and in particular, a special place is given to DNS servers. The settings of such servers for many people are a rather laborious task. However, at the output you get extremely reliable and secure servers that provide basic protection, as well as parental control, that is, blocking unwanted, malicious and even dangerous websites.

However, the most important element that affects how efficiently your DNS - the settings of this server will work, which you need to perform extremely competently.

What is DNS?

DNS is a specialized distributed system for determining the correspondence between the numeric IP address of a computer and its name. Such addressing is most convenient from the point of view of machine processing of various route tables, but at the same time - absolutely unacceptable for human use. After all, a person remembering sets of a huge number of digits is much more complicated in comparison with meaningful names.

Initially, to simplify the interaction, and also to make it easier for users to configure the DNS server itself, specialized tables were used in which the correspondence of numerical addresses to individual machine names was established, and such tables have been preserved to the present day and are actively used by various old Application programs. In particular, we are talking about files named hosts. Today, most users know different Internet resources for their domain names, and this statement is fair not only for the addresses of different websites, but also for e-mail addresses.

At the same time, in any address the individual domain name of the server occupies the dominant position.

Why do I need DNS servers?

Thus, you can determine the main purpose of the DNS server configuration and its further use:

• Obtain unique information about the IP address of a particular server in accordance with its name and vice versa.
• Routing of various e-mail.
• Providing full information about what the serving servers are of certain protocols on the network.

Why is the correct setting important?

For example, in Ubuntu DNS configuration at a detailed level requires some knowledge, as well as a full understanding of what constitutes a particular setting. In this case, there can not be any talk about experimenting by engaging a server change within a particular company. After all, if in Ubuntu DNS configuration will be implemented with at least one rash action, then the whole network of this company will represent a little more than a large number of wires, since no service can work normally.

But many self-confident users like to enter all the settings exclusively manually. And this applies even to such simple things as the introduction of an IP address, subnet mask, and the gateway address and DNS settings on the computer. But in fact, many people have been automating such processes a long time ago.

Windows 8

1. To configure the server in this operating system, you initially need to move the mouse to the lower left corner of the screen, click LMB on the "Start" button, and then open "Control Panel" through the context menu.
2. Now go to the "Network and Internet" section, then "Network Management Center" and now go to "Change adapter settings".
3. In the menu that appears, you will need to select the appropriate network connection from the list. After you find it, click on it and select "Properties".
4. In the list "Marked components used by this connection", you should select the "Internet Protocol version 4 (TCP / IP)" option and also click the "Properties" button.
5. Now a new window will open, and in particular the "General" tab, where you will need to select "Use DNS addresses".
6. After you tick the box, you unlock the ability to enter various data in the lines below and now you can enter the parameters of the DNS server in the fields, the settings of which you are interested in.

After that you will need to click "Ok" so that the changes you have made have been saved. Special attention should be paid to the fact that you do not need to enter parameters into the upper lines (IP), namely to the bottom ones, because otherwise you will not be able to enter the necessary DNS parameters, the settings of which should be changed.

Windows 7

1. Again, as with the previous operating system, open the control panel.
2. In the "Network and Internet" section, select "View network status and tasks".
3. In the "View active networks" line, you will need to select the item that is to the right of the "Connections" button.
4. In the window that appears, you will need to click the "Properties" button, "Connection Status".
5. In the list "Marked components used by this connection", you should select the "Internet Protocol version 4 (TCP / IP)" option and also click the "Properties" button.
6. Now a new window will open, and in particular the "Network" tab, where you will need to select "Use DNS addresses".
7. After you tick the box, you unlock the ability to enter various data in the lines below and now you can enter the DNS server parameters in the fields, the setting of which you are interested in.

Click "OK" and the settings are saved.

Windows XP

Next, we'll look at how to verify DNS settings or make changes to them in Windows XP:

1. From the "Start" menu, go to "Control Panel".
2. Now select "Network connections" and look for the one that we need.
3. When you go to the "General" tab, you will need to select the "Properties" option in the "Connection Status" line.
4. Now you need to go back to the "General" section, scroll down, then select the "Internet Protocol (TCP / IP)" section and select "Properties" again.
5. In the "General" section at the bottom, check the box next to "Use DNS addresses", after which you will be able to enter the required data.

Press the Ok key and close all windows. The settings will be saved.

Windows Vista

Now let's look at how to check DNS settings and make changes to them in the Windows Vista operating system:

1. "Start"> "Control Panel".
2. "Network Management Center"
3. In the "Network" section you will need to select the option "View the status of each connection".
4. In the window that appears before you, click on "Properties".
5. As in the previous case, scroll down until you have the option to select "Internet Protocol version 4 (TCP / IP)", then click on "Properties".
6. Check the box next to "Use DNS addresses", after which you will be able to enter various information.

Click "OK" and close all windows, any settings will be saved.

Linux (Ubuntu)

In Linux, the DNS configuration is performed using the resolvconf service, by which the parameters are adjusted based on data received from different subsystems. One of the useful properties of this innovation is that now the file of this system is generated completely automatically, and not individually by each separate program, which needs to make various changes, but with the help of a common program interface. Thus, any changes to this file that you will try to make with your own hand will eventually be lost.

In this regard, information about DNS intended for static interfaces must be entered in the specialized file etc / network / interfaces in the search, nameservers, and domain. In this case, these parameters should correspond to those characteristics specified in the resolv.conf file.

Debian

If you need to configure DNS in Debian, then this procedure is almost the same as that provided by other distributions. You will need to add an individual host name, as well as its IP address, to a separate etc / hosts file for various static requests. To ensure that your computer subsequently repeatedly sends all kinds of requests to the appropriate server, you just need to add the address of this resource to a separate file, etc / resolv.cong.

For example, if you use a computer with the address 192.168.1.1, which should continuously send all kinds of requests to a specific DNS server, then the resolv.conf file should contain the following line: nameserver 192.168.3.2.

Thus, you can change the settings of DNS servers in any operating system. It is important to set the exact addresses that the operator provides to you, otherwise you just can not get the connection.