Virtual Private Networks Commonly Called As Vpn

OpenVPN is an open-source software application that implements virtual private network (VPN) techniques for creating secure point-to-point or site-to-site connections and remote access facilities. OpenVPN allows authentication using certificates or username/password. OpenVPN can work in two different modes regarding encryption. It can use static encryption or Public Key Infrastructure (PKI). The advantage of static encryption is that it is very easy to configure. The disadvantage of this type setup is that if your encryption key is compromised, all VPN data can easily be decrypted. The PKI mode resolves many of the issues static encryption has. It

VPN refers to the networking technology Virtual Private Network. A VPN allows users connected to this network the ability to access any website or computer data from any location in the world with dedicated and secure networking environment rather than being present in a public server. Majority of VPN users belong to business class industry and educational purposes. VPN networks are used in this manner because majority of VPN networks offer the features like encryption and anonymity which increases the privacy and security benefits while using the VPN network. VPN networks also allow the user ability to perform activities on the internet as if they were accessing

VPN is the abbreviation of Virtual Private Network. A VPN can extend a private network (like local network) across a public network, such as the Internet. It enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network, and thus benefit from the functionality, security and management policies of the private network [7].

Douligeris, C., Serpanos, D. (2007). VPN Benefits. Network Security: Current Status and Future Directions. John Wiley and Sons

A VPN offers mobility and security for remote workers. The VPN uses an encrypted connection using the Internet. Remote workers wanting to use the Internet file server need authenticate their identity with a login id, password, RSA token, or smart card. The VPN can be used on company-owned laptops and personal electronic devices (PEDs). The VPN works by using data encapsulation. Encapsulating data packets into another set of data packets and data header this is the ‘tunnel’ used to send private data through the Internet. The data reaches its destination where the data is extracted from the 'tunnel'. It is then sent to the Application Layer where the remote worker can view or retrieve the files. This is a dedicated connection between the company and the remote worker computer. It is failsafe; the data sent through the VPN is encrypted by the sender and decrypted by the receiver. This prevents the data from being altered, read, or stolen by a hacker. Different cryptographic rules on each layer of the OSI model provide secure data transmission, authentication, confidentiality, and nonrepudiation. The cryptographic tunneling rules implemented for data security in each of the OSI layers (starting with the bottom layer) are listed

Virtual private networks (VPNs) were originally associated with remote connectivity services, such as public telephone networks and Frame Relay PVCs (VPN History). They evolved into IP based data networking. Early VPNs required extensive expertise to implement, but today deployment is simple and affordable. VPNs are based around technology that ensures strong authentication and encryption (Cartwright, 2003).

The benefits of using VPNs are reduced cost overhead, reduced management overhead, and added security (Microsoft Press, 2000). Least network lines are expensive and VPNs reduce then need for extra data connections. This in turn also aids in reducing the amount of overhead associated with managing a network. The added security benefits for a network include encrypted transmission of network data and

VPN has several advantages over the dial-up networks and leased lines. The capacity of these lines is available at all times but fixed and flexible. The traffic on these private networks belong only to the company deploying the network. There is an assured level of performance but it comes with a very high price [4].

VPN has been associated with remote connectivity services in the past such as the (PSTN), Public Switched Telephone Network. This network is starting to be coupled with IP networks. In the past IP network enterprises had broadband

A VPN is a private network technology that provides a way of protecting information that being transmitted over a public infrastructure (usually the Internet). As the name suggest, VPN uses “virtual “connections to connect remote site or remote employee to business 's private network. Users could build a virtual private tunnel to enter an secure internal network and to access resources and information.

Three major network types are local area networks (LAN), wide area networks (WAN), and virtual private networks (VPNs). The LAN covers a smaller geographic area than the WAN. The trade-off is the LAN transfers data at higher rates than does the WAN. Control of the network varies between LANs and WANs. LANs are usually controlled by the organization, along with the hardware and software running on the LAN; whereas, WANs are usually controlled by a third party (Cowley, 2012; Wager, 2013). A VPN allows remote access to an organization’s LAN, this type of network is helpful when employee’s need to access data remotely, like in the case of a

#37 a VPN establishes a secure network connection and protects the LAN’s data from being seen by outsiders. The VPN connection enables a remote or mobile user to access the network as if they were actually at the network, the connection is encrypted providing privacy for the data packets being transmitted.

A leased line is typically used to connect offices together that are geographically far apart. Leased lines are reliable and secure, but they are expensive in comparison to other means of connection,

Internet technology has changed the way that companies commonly information to their employees, customers, shareholders and suppliers. In the early day, the company was careful with the information that they published on the Internet such as product information, availability of products, and other important information of business on the internet. More recently, the use of VPN to go through the internet with high security, against attack and steal information, it has been become a way to provide efficient access for employees, customers, partners to important business information of company.

1.     Virtual Private Networks: When a virtual private network is implemented, the lowest levels of the TCP/IP protocol are implemented using an existing TCP/IP connection. There are a number of ways to accomplish this which tradeoff between abstraction and efficiency. The advantage this gives you in terms of secure data transfer is only a single step further away. Because a VPN gives you complete control over the physical layer, it is entirely within the network designer’s power to encrypt the connection at the physical (virtual) layer. By doing this, all traffic of any sort over the VPN will be encrypted, whether it be at the application layer (such as Mail or News) or at the lowest layers of the stack (IP, ICMP). The primary advantages of VPNs are: they allow private address space (you can have more machines on a network), and they allow the packet encryption/translation overhead to be done on dedicated systems, decreasing the load placed on production machines.