29 Jun

What is a VPN(Virtual Private Network) ?

A virtual private network, or a VPN, is a system that uses the public network, like the Internet, to extend a private network. A computer or a network-enabled device connected to the VPN of a certain company, for example, will be able to receive and send data through public or shared networks and act like it is connected directly to the company’s private network and still get the same security, management policies, and functionality of the corporate infrastructure.

 
Common Uses of VPN
The VPN technology is commonly used by educational institutions, large corporations, and government agencies which have individuals working from remote locations. Like a WAN or a Wide Area Network, VPN is also used in connecting multiple sites separated by large distances. It is also often used to allow access to Intranets from any part of the world reaching a wider user base. Some campuses which have branches or subsidiaries all over the country or the world can use VPN for secure connections.

 
How VPN Works
Accessing the private network from outside its physical location requires a public network connection, a user account, and a password. Some more secure infrastructures employ the use of RSA tokens for additional authentication. An RSA token device generates a personal identification number or PIN that the user must input during the authentication process.
The PIN expires after a set time and a new one is generated again. This makes it impossible for a malicious user to access the network without the RSA token device even if he knows the user account and the password. VPN secures communication through a variety of protocols that are used to encrypt the data being transferred. Common protocols used are IPSec, PPTP, L2TP, SSL and TLS.

Why Use VPN?

VPN use has transcended the corporate environment and is now being provided by more and more companies that offer secure connection and anonymity. Although a large percentage of VPN implementations are still on corporate applications, private individuals who don’t want people snooping on their connections are using VPN to protect their security and identity.
VPNs also allow access to sites and applications that are blocked from some geographic locations. A user might require access to a video streaming site that is blocked on a certain country and connecting to a VPN server can facilitate that request. Some individuals also would want to hide his Internet activities like when visiting personal sites and downloading files, and VPN can help.

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29 Jun

What is a proxy?

A proxy, specifically a proxy server, performs intermediary tasks between a requesting computer and another computer from which the services are being accessed. It can be a dedicated computer or software which catches the requests to the source server, caches the data, and returns the information to the client computer. A proxy can be used to improve access performance, filter requests, or hide the identity of the requesting party.

Data Caching to Improve Performance
The most common application for proxies is web caching. A web proxy caches the information gathered from individual requests and stores that data for a certain amount of time. When a computer requests a web page or certain files that have been cached, the proxy server just returns the requested data immediately instead of getting them again from the source server, thereby significantly reducing access times.
If the data is not available on the cache, the proxy server fetches it from the source server, saves a copy on its cache, and returns it to the requesting client. Web proxies use algorithms to determine how long cached data should be kept before purging them.

Web Filtering to Enhance Security or Improve User Experience
Another common use for a proxy server is web filtering and this application is usually seen in corporate networks. A web filtering proxy can prevent users from accessing sites and services that it deems as not secure or inappropriate for the corporate environment. These can be sites that contain malicious code and even viruses which can wreak havoc on a computer and risk the security of the whole infrastructure or a site with censored and offensive content. Other web filters can reformat pages from the site for better viewing on mobile phones, or for printing.

 

 

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29 Jun

What is the difference between Private VPN and Shared VPN ?

Private VPN’s provide a single IP (Internet Protocol) address which only you can use. Hence, you don’t need to worry about being banned or blacklisted by any website, unless you violate any of their terms and conditions. It also gives you total control over the efficiency of the IP address. Consequently, Private VPN’s are more expensive than Shared VPN’s. On the other hand, Shared VPN’s provide an IP address which is also being used by another users simultaneously. They are also more affordable than Private VPN’s since you share the costs with different users. However, you run the risk of getting banned if one of the users on the Shared VPN gets banned.

Uses and Benefits of VPN’s

By having VPN’s installed in their computer networking devices, corporations can now extend their intranet resources to employees working from home or remote branch offices. VPN’s can also bypass firewalls and geographical restrictions. Students can also access information provided by their schools and organizations through VPN’s at their homes.

How do VPN’s (Virtual Private Network) work?

A VPN is an internet privacy technology or communications network that allow users to securely access private networks and share data through public networks. Moreover, VPN’s provide protection and security to information transmitted over the internet.

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29 Jun

What is the difference between Private Proxy and Shared Proxy ?

The difference between private proxies and shared proxies mainly lies on their exclusivity. Private proxies are only used by one person. Hence, you don’t have to worry about the bandwidth speed because no other person can have access to it except you. Some applications also work much better with private proxy servers.

In shared proxies, you share your IP address with several internet users. With shared proxies  you run the risk of getting banned in case one of the users in the Shared Proxy gets banned. However, Shared proxies are cheaper than private proxies.

 

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29 Jun

What is the difference between Public Proxy and Private Proxy?

Comparing a public proxy and a private proxy is like comparing your own telephone to a payphone; Payphones are used by so many people; on the other hand, telephones in your home are only used by you or the people living in your home. In the same way, private proxies are used by only one person while public proxies are used by thousands of persons. When it comes to reliability and efficiency, private proxies trump public proxies. Public proxies usually don’t work and when they do, they are slow. Also, Public Proxies eventually crash because they are used by thousands of people. By using public proxies, you also run the risk of revealing your private information to hackers. Public Proxies will certainly be overrun because of so many people searching for free proxy servers. On the other hand, Private Proxies last longer as compared to Public Proxies; they are also a lot faster because they aren’t being abused by the public.
In conclusion, private proxies are more efficient than public proxies because they are used by only one person at a time.

 

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