The host’s file can be manipulated this can be effectively done with the domain naming system sinkhole, if you use the loopback address to each known as the ad server, the traffic can be directed as intended by the user and the ads will subsequently go off the grid, not to the user. The direction is to a black hole or to a local machine. Make the best use of Adblocker to block unwanted ads.The method of filtering can be done with changing records with the help of DNS cache. When you prevent the records from doing so, it will not be able to get access to the domain names. The DNS can record from the file and all this a part of resolution process of the domain name. the cache is looked up before contacting the server. Hence the records are given priority over the server queries. This method is very flexible compared to other which are used for blocking ads. There perfect usage or you may call optimum utility of the cache records that are available.
How it can be done
When you want selective blocking the traffic on the DNS is done by the firewall present with it. this is based on the name patterns. This works in two ways
- By blocking the access to the IP addresses with unresolved in the DNS.
- By name resolution which is referred with the patterns of names.
Blocking the server hostnames which have server ads, by bluffing the address. This can be done with a modified server which has been specifically utilized for this purpose. This method is widely used, and it will be like guiding the user to what to see on the internet. It can be generally used for personal purposes too. Certain countries of the world who want to have control over what their citizens should view have employed this method so that it all under their control and to see what one should or not see. But other places this system is partially employed for certain applications and in some cases, it is so manipulated that there will perhaps more ads added to the domain or swapped with ads which are local and cater the territorial target of people for certain sets of users who will get to see them and not the general populace.
Certain DNS domains can be sometimes substituted with the local ads and broad form of it. There are advertisers have to do away, of paying for clicks or even page reviews in some countries. There is blocking done for non-commercial reasons too.
The local VPN connection sometimes may have filtering ability in the host itself. Here the root access is not required. This will allow only the host files whereas there is the blocking of the ads. And the ad networks are filtered out of the network with the help of the device installed. This bypassing of root permission is possible when the VPN is on and this filtering stops when the VPN is disconnected, and the ads continue to come after this disconnection. Their access to content which is bond by ads and the blocker like this will deal with it.