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Increase computer security through DNS server

TipsMake.com - DNS is a core component of the Internet. The protocol helps convert a web address, often called a URL into a physical address, or IP address. The computer knows how to transmit information to certain IP addresses, but does not directly know the IP address from the URL, a type of nominal address that makes it easy for users to remember. Therefore, the DNS server is available to help resolve domain names so that computers can obtain IP addresses based on URLs for communication over the Internet.

Not only is a central DNS server responsible for resolving URLs for everyone. There are many different DNS servers in the world that are located on ISP Internet providers or third party services such as OpenDNS. In fact, users will use the DNS service from the ISP side if they do not make any settings changes to the computer or router. However, DNS servers from ISPs are usually simple, meaning only the URL resolution function. They often do not rely on security, so these servers are quite sensitive to network attacks.

Increase computer security through DNS server Picture 1

When a DNS server is attacked, some changes may occur. First, the server is simply interrupted or offline and cannot resolve the URL to the user as usual until the ISP fixes the problem. Second, an attacker can change DNS records on the server and point certain URLs to other fake sites. This is a particularly dangerous attack because phishing attacks are often detected due to a strange URL, but with a DNS server error, the URL is still displayed exactly as before but the user is still led. Go to another website.

Solution

Therefore, the safest method is to switch to using a DNS server that is better supported. There are a number of DNS services for users to choose from, such as Google's public DNS servers built by the search giant itself and regularly maintained, so we won't have to worry about any inconvenience. Which network attack. Or, users can use OpenDNS for a more complete DNS experience. The service has special options to help prevent certain types of network attacks and even a viable web filter.

Increase computer security through DNS server Picture 2

After you determine the DNS server you want to switch to, you will need to change the system settings. How to change this setting differs depending on the operating system type.

Windows users will need to access the network properties and then access the IPv4 properties and change the DNS servers at the bottom of the window that appears.

Mac OS X users need to go to System Preferences , click Network , select the network device, click Advanced and then enter DNS servers after clicking on the DNS card.

Linux users will need to click on the network applet, choose Edit Connections , click Edit . Under the IPv4 Settings tab, select Automatic (DHCP) addresses only , and then add DNS servers to the DNS servers text box, with each server address separated by a comma.

Even Android users can change DNS servers but it only works when you use Wi-Fi. Therefore, you can find the appropriate settings when you click the Menu key and select Advanced while in the Wi-Fi settings screen.

Note: Google's DNS servers have addresses 8.8.8.8 and 8.8.4.4 while OpenDNS servers are 208.67.222.222 and 208.67.220.220.

Conclude

The errors that arise on DNS servers are actually more serious than people often think a lot because few people talk about them or mention switching to another server. Changing the DNS server should be the first priority to keep your computer safe.

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DNSDNS serverURLIP addressOpenDNSGooglenetwork attacksecurityIPv4

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