A Virtual Private Network (VPN) allows users to send and receive data via a shared or public network across a public network as if their computing devices were linked directly to their private network. Thus the usability, security, and control of the private system can support applications running on a computer machine, for example, laptops, desktops, smartphones through the VPN program. Encryption is a standard part of a VPN connection but is not an inherent part of it.
VPN technology has been developed to allow remote applications and corporate resources to access remote users and offices. To ensure a secure network connection, an encrypted tunnelling protocol is used, and VPN users use authentication methods such as passwords or certificates to access the VPN. In other applications, Internet users can encrypt their VPN connections, circumvent geo-restrictions and censorship, or connect to proxy servers to shield their identities and locations to remain anonymous on the Internet. Many websites, however, block access to established VPN technology to prevent their geo-restrictions from being circumvented, and many VPN providers have built strategies to address these blockages.
Using VPN in Android for Free Internet
VPN is used for linking two networks, unblocking websites and anonymizing your link. VPNs were used initially to access systems, large enterprises, educational institutions and state agencies. Using VPN technology to allow remote users to connect securely to a private network. And the VPN was also a tool to circumvent censorship of the Internet. Tech experienced consumers use it to stop network sniffing. Many may use it to avoid geo-blocking. This is now used for unrestricted access to the Internet. The VPN substantially encloses the entire network traffic to the VPN server through the loophole.
Let’s list some loopholes which can usually be used so that we can access the Internet free of charge.
This is the most regular loophole you can use. ICMP protocol is usually left open as ICMP and what we often know as PING is used by the network administrators to evaluate network problems. You can use the VPN that has ICMP protocol to get free internet access. When you open your order prompt or ping a web site, and get ping answers without a problem.
This is another common trick that can be used since DNS requests can move freely over most firewalls. If you want a hostname to be resolved at the correct IP address, you are using DNS. UDP 53 is used in the DNS protocol. Many networks are set up to allow free passage of UDP packets intended for port 53, as they believe it is a DNS request. You may be able to configure your UDP Port 53 VPN to link to UDP Port 53 if you have a small internet connection or do not have any data plan but still can resolve hostnames.
Host Header Exploit
This can be used in connecting a TCP VPN connection, which enables you to configure a specific HTTP header. This feat works by allowing other websites to be navigated freely by your ISP. By connecting to the VPN server, the VPN adds an HTTP Host header; your ISP assumes you are linked to the free website but are connected to your VPN server.
Other Open Ports
ISPs still have other open ports. I do not know why they are left open. Probably the renowned UDP port 9200 is used by your networking services in connection with the “WAP Connectionless Wireless Session Protocol” (WSP). This is likely why network providers have always kept that open.
You will likely still use other ports. You can use the port number between 1 and 65535. Some network providers also monitor source port number, as this is the port to which the VPN connects, or what we sometimes call as a local port number or bind port number. ISPs occasionally only pass UDP / TCP packets with a particular source and destination port. Therefore, you may also want to mix and match remote and local port numbers if you wish to an open port number. For instance, if you bind to port 53 but do not allow it to link to another port number, you can connect to port 9200 only.
Not all network providers and paid Wi-Fi hotspot work with these feats, but you certainly have to try it before paying off for high rates or Wi-Fi.
We’re not attorneys to inform you whether or not this is illegal; many people will see this as theft. So we suggest that you contact a lawyer for competent assurance that you won’t be held in jail.