Everything you need to know about network DNS server Vietnam

A DNS server Vietnam is a computer server containing a database of public IP addresses & their associated host names.

Other names for a DNS server include name server, name server, and domain name system server. In most cases, DNS server serves to resolve or translate those common names to IP addresses as requested.

DNS servers operate special software and communicate with each other using special protocols. In another way, a DNS server on the internet is the device that translates that www.vinahost.vn you type in your browser to the 141.111.109.191 IP address that it really is.

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1. Why do we have DNS servers?

When you enter www.vinahost.vn into a web browser, all you have to understand and remember is the URL http://www.vinahost.com. The same is true for any other web like Twitter.com, Tumblr.com, etc.

The opposite is true too, that whilst we can understand the words in the URL far easier than the IP address numbers, other devices understand the IP address.

Why we have DNS server in Vietnam? Actually, while we want to use simple names to access the webs, the computers can read only IP addresses to do that. The DNS server is created to translate between the IP address and hostname.

2. Malware & DNS servers

Malware can attack your computer in a way that changes the DNS server installation, which is something you do not want to happen. This is re season why it is always vital to be running an antivirus program.

However, if the virus changed your DNS server settings, entering the same URL might take you to a different web or to a web that looks like, for example, your bank web. This fake bank site may look like the real one. Instead of letting you login to your account, it will record your username & password, giving the hackers all the data they need to access your bank account.

Generally, malware attacking your DNS Vietnam server just redirects popular webs to ones which are full of advertisements or fake virus webs that make you think you must buy an antivirus program to clean an infected computer.

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There are 2 things you should do to avoid becoming a victim in this way:

  • The first is to be aware of how a web looks. If it is slightly different form usual or you are getting an "invalid certificate" message in your browser, it may be a sign that you are on a fake web.
  • The second is to set up an antivirus program, so that the malicious programs are eliminated before they do any damage.

3. More information on DNS servers

In most cases, 2 DNS servers (a primary + a secondary server) are configured on your computer/router automatically when connecting to your Internet Service Provider via DHCP. This allows you to configure 2 DNS servers in case one of them happens to fail, after which the device will resort to using the secondary server.

Some DNS servers offer quicker access times than others but it completely relies on how long it takes your device to reach the DNS server. For instance, if your Internet Service Provider 's DNS VN Vietnam is closer than Google's server, you will find that addresses are resolved faster using the default servers from your Internet Service Provider than with a 3rd party server.

If you are experiencing network problems where it seems as if no web will load, it is possible that there is a problem with the DNS server. If the DNS server cannot to find the correct IP address which is associated with the hostname you enter, the web will not load. Additionally, this is as computers communicate through IP addresses and not host names (that means the computer does not know what you want to reach unless it use an IP address).

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The DNS server settings is "closest" to the device are the ones applied to it. For instance, whilst your Internet Service Provider may use one set of DNS servers which apply to all the routers connected to it, your router can use the different set that will apply the DNS server settings to all devices connected to the router. However, a computer connected to router can use its own DNS server settings to override the ones set by both the Internet Service Provider and the router...

What we explained above is about how malwares control your DNS server VN settings and then override them with servers which redirect your web requests elsewhere. Whilst this is definitely something that scammers can do, it is also a feature found in some DNS services (Open DNS) - but it is used in a good way –of course.

There are some DNS servers located within the connection of computers that we call the Internet. If you do not know, the most vital servers are 13 DNS root servers storing a complete database of domains and their associated public IP addresses. 10 of them are in the America, 1 in UK, one in Sweden, and one in Japan.

 


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