Blocking websites The blocking of websites is when a specific party blocks a group of websites from Internet users so that they cannot access or visit them. The blocking process may be carried out by governments to protect children from certain sites or for various reasons that may be political, and the blocking process may be within the scope of the same home; So that parents either use specific software or configure devices so that their children do not see suitable websites; Like porn sites, or social networking sites, or otherwise.
Some companies block websites for their employees. With the aim of increasing their productivity by eliminating distractions and entertainment; So that the employees' use of the Internet can be limited to research sites, or various means of communication. One of the reasons companies block some websites from their employees is that some employees may visit certain sites that may disturb their co-workers.
Some countries resort to blocking a group of websites from their citizens for various reasons, and among these reasons is political. Such as blocking websites that contain what is contrary to the laws of the state, including what is social; Such as blocking gambling sites, drugs, and others. Among the reasons for states blocking certain websites may be security reasons; So that there are some sites that contain ideas about wars or oppositions that the countries may deem inappropriate, in addition to that, some countries may block some Internet tools such as e-mails, chat programs, or any means that may enable the user to avoid the blocking imposed by the state .
There are several countries that are famous for having a large number of blocked websites, and some countries use modern techniques in the process of blocking. China has what is called the "Great Firewall", which is a system for filtering websites by doing a continuous search for destructive websites on the Internet. To be blocked, and Myanmar uses strict measures against Internet users. Such as putting an end to censorship of Internet cafes, and having computers in them take a picture of the screen every few minutes.
The means used to block websites
There are several methods that the responsible party may resort to blocking websites from users, including the following:
Packet filtering: It is a method by which the firewall is used to monitor all the incoming and outgoing packets to and from the network, and based on the words that the packets may contain, the communication (the process of exchanging packets) between the sender and the receiver is cut off.
Deep packet screening: Some security agencies use this method to eavesdrop on Internet users. By checking the data in the packet to reveal the specific words it contains; An email address, phone number, or IP address, etc.
Blocking your IP address: This is one of the simplest methods of blocking websites. So that the responsible party blocks the websites' IP address; However, this method will block any other sites that share the same IP address (as is the case with sites that use the shared hosting system for the server.
Domain Name System Filtering and Forwarding: The process of blocking websites in this way is done by not processing the website address by the DNS server; As this server is responsible for translating the written form of the website into the form of an IP address, and usually Internet providers provide these servers to their customers.
Intermediary attack: It is basically a method used in penetration, in which an intermediary device is inserted between the sender and the receiver so that all the packets pass through this intermediary, which in turn redirects the packet to the desired destination, so that both the sender and the receiver think that the communication process is in the required manner, ignorant of the existence of A party is eavesdropping on them, and China used this method in 2010 to filter and block websites. Disconnecting the TCP communications.
Website address filtering: A survey is conducted on the addresses of the websites being visited to detect the presence of any words that make the site suspicious.
How to open the blocked websites
There are several methods that can be used to open blocked sites, and a certain method may be better than others depending on the method used in the process of blocking.
Among the ways to avoid blocking websites are the following:
Use a Virtual Private Network (VPN): When using a VPN to access the Internet, all packets exchanged between the sender and the receiver when visiting a website pass through this virtual network only. This method is perhaps best for countering blocking in cases of URL filtering, Packet Filtering, Deep Packet Inspection, and Medium Attack.
Using the Tor network: Any connection to a specific site via the Tor network will be automatically encrypted, and it is preferable to use Tor in cases of blocking done by website address filtering, packet filtering, deep packet detection, and middleman attacks.
Change your DNS Server: This method is best for countering blockages that are filtering and forwarding your DNS.
Using a proxy server: The proxy server is similar in terms of its mechanism to the virtual private network, except that it is not as reliable, and this method is good for avoiding blocking that depends on blocking the website's IP address.
Create a channel using the secure transport protocol (SSH Tunnel): This method is somewhat advanced and complicated, and it is similar in terms of its mechanism of work to the virtual private network, so all the packets are passed through a server that the user can access using the secure transport protocol, so that the process of surfing the Internet However, it takes place through this server.
Also you can use a good vpn. Sometimes that will allow you into the site. Thanks for the good read.