DNS is significant in working out the URLs you enter into the address bar of your browser. Lots of work goes into Domain Name Solution. This is a kind of recursive operation that helps your browser get the IP address of the web site you’re attempting to reach out. If interested, you may also read more about Servers and DNS Lookup.

The local cache which has the resolved IP addresses of sites that you regular is referred to by the term DNS Cache. The concept of DNS Cache would be to conserve time that will otherwise be spent on contacting DNS servers that will take up a group of operations that are recursive to find the real IP address of the URL you have to reach out. But this cache could be poisoned by cybercriminals just by altering the entries in your DNS cache for the sites you use to bogus IP addresses.

As the name implies, Redirection or DNS Hijacking is a method used by cybercriminals to hijack your browser’s effort to work out the IP address of the site you want to load. In text format are for ease of use. For every URL, there’s an IP address as well as a group of operations go into converting the text URL into a numeric IP address. Since there are lots of operations involved in working out the IP address, cybercriminals can take great advantage of the delay and send a bogus IP address that belongs to them, to your computer.

The most frequent way of DNS Hijacking would be to set up a malware in your pc that alters the DNS so that whenever your browser attempts to solve a URL, it contacts one of the bogus DNS servers instead of actual DNS servers which are used by ICANN (power of Internet that’s in charge of filing domain names, handling them, supplying them with IP addresses, keeping the contact addresses and more). The direct DNS servers your computer contacts are the DNS servers being used by your Internet Service Provider – unless you have changed them to something different. When an internet connection is purchased, the DNS servers in use have the ISP – recognized by ICANN.

The malware in your pc alters the default DNS trusted by your personal computer to point to another IP address. In that way when your browser attempts to solve an IP address, your computer contacts a bogus DNS server that offers you IP address that is incorrect. This results in your browser loading a malicious web site that could endanger your personal computer or steal your qualifications etc.