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Virtual Private Network

Written By:  on February 9, 2010 No Comment

The word "technology" has its origins in the Greek. Technology is a result of science and technology. It is the kind of human beings to improve their environment.

One method is involved - effectively making use of tools and machinery for the task. Over time we have a rapid growth and changes in technology such as PCs, podcasts, audio-and videoconferencing, observed electronic teaching centers, etc. A move between the different technologies is the PrivateNetwork.

A VPN is a that uses a public like the Internet to remote sites and users together. A VPN uses "" connections over the Internet from the company's , the remote site or employee will be forwarded.

Conduct a public like the Internet can VPN traffic on specific standard protocols. A Service Level Agreement (SLA) between the VPN client and the VPN service provider created to enable the existence of a serviceProviders and .

Advantages of a VPN:

* Improved safety and productivity

* Simplified topology

* Lower operating and transportation costs

* Fast Return on Investment

* Extensive connectivity around the world

Features:

* Reliable

* Secure

* Scalable

* and Policy Management

VPN types:

1. Remote Access VPN

2. IntranetVPN

3. Extranet VPN

1st Remote Access VPN:

Remote Access VPN is a user-to-LAN (Local Area ) connection from an organization whose employees need to be used on the from remote locations together.

The remote access VPN saves the expense of free spending and secure (encrypted tunnels over a public like the Internet), scalable

2nd Intranet VPN (Interconnecting corporate websites):

The IntranetVPN helps with the cost savings over dedicated, leased lines. There are tunnel connections and encryption, which allows a reliable throughput.

3rd Extranet (VPN connection between the company's Web site (s) to external business partners or suppliers)

Extranet VPN extends WAN (Wide Area ) to business partners.

VPN Security:

The most important part of a VPN solution is security. A VPN helps by data over public networks, and this is cause for concernon risks to data and the impact of data loss. A must have the freedom to provide services in the field of security authentication.

Authentication ensures that a user or a system that pretends to be the user. Security is guaranteed.

Authentication mechanisms:

* Login name, password, PIN (password - specified number of digits, followed by 8 bits, the constant changes at regular intervals)

* A computer-readable characters, such as a smart card

*Fingerprint, iris or retinal pattern

Tunneling:

Tunneling is a very important part of a VPN. Tunneling is a question of a package in another package and sends it over a . The (such as the Internet) through which the packet is sent, and * tunnel-understand interface, the protocol of the outer package.

Protocols used in tunneling:

* Carrier protocol - The protocol by the that the information usedTravel via

* Encapsulating protocol - The protocol (GRE, * IPSec, L2F, PPTP, L2TP), which is wrapped around the original data

* Passenger protocol - The original data (IPX, NetBEUI, IP) being carried

Example: A package can not be a log on the Internet, as can be supported NetBeui used within an IP packet to be placed and will be safely sent over the Internet.

Given the current business scenario development trend which isincreased commuting / teleworking and broad global operations, with employees who connect to central resources from remote locations in order to communicate, such as VPN technologies are proving very useful and important.

* Tunnel Interface: The two points at which the packet enters and leaves the .

* IPsec is the security of the IP standard, which is supported by the client. Performs IPsec packet-by-packetAuthentication and end-to-end encryption. In addition, IPsec support IP in IP Encapsulation for Address Translation.

Wikipedia, security search, google

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