Virtual private networks (VPN) provide an encrypted connection between distributed sites over a public network (e.g., the Internet). By contrast, a private network uses dedicated circuits and possibly encryption. The basic idea is to provide an encrypted IP tunnel through the Internet that permits distributed sites to communicate securely. VPN's permit secure, encrypted connections between a company's private network and remote users through a third-party service provider. A VPN can grow to accommodate more users and different locations much easier than a leased line. In fact, scalability is a major advantage that VPN's have over typical leased lines (dedicated circuits). Unlike with leased lines, where the cost increases in proportion to the distances involved, the geographic locations of each office matter little in the creation of a VPN. Descriptions / Types Virtual Private Networks allow enterprises to utilize cost effective, secure, and scalable hardware to extend their wide area network. These networks are cost effective in that they are able to connect remote users to the corporate network without the need for expensive dedicate WAN links or modem banks. They also allow remote users to utilize their own internet connections from their remote site which also saves the corporation money. In essence, the longer the distance is between the connections, the more savings the company can realize. Increased security is also a factor in that it provides encryption between the two sites and that helps protect against unauthorized access to the system. The system is also scalable in that additional hardware is easily added to the network to allow for more users. This allows the corporation to add significant amounts of new users without significantly changing the network infrastructure. VPN's are typically platform independent with the majority of the VPN's occurring on UNIX, Windows, or Macintosh. They all operate seamlessly; offer strengthened security, mobile user support, and ease of use. Site to Site Site to site VPN's extend the wide area network in the sense that they provide large scale encryption between multiple sites such as remote offices and central offices, and also over the internet. There are two main types of site to site virtual private networks, internet and extranet (HowStuffWorks.com). Intranet based VPN's are used for connecting one or more remote locations to the existing LAN, while an extranet based systems connect one or more different companies to the existing LAN to create a shared environment or partnership. Site to site VPN's typically use a tunnel in which the communication between the two sites is handled from router to router, where the communication between the two is seamless to the end user.
In order to protect the application servers from the internet, the most common un-trusted network, the proposal suggests a firewall to be installed between the internal network and external router. The firewall would be an Adaptive Security Appliance (ASA) firewall, "the ASA is not just a pure hardware firewall. In brief, the Cisco ASA is a security device that combines firewall, antivirus, intrusion prevention, and virtual private network (VPN) capabilities. It provides proactive
Two routers demark the border between internet and intranet. Internal to these routers are two more routers, creating the appearance of a demilitarized zone (DMZ). However, there are access points, the wireless antenna system and the remote access server (RAS), that provide deeper intranet access that do not rely on the DMZ, rendering the latter rather decorative than substantial. Lastly, there is the virtual private network (VPN) that makes use of the edge routers and provides greater intranet access. Over all, there are four access points: VPN, two edge routers, the RAS, and the wireless system. The RAS, VPN, and wireless provide internal access.
The increasing use of NAT comes from a number of factors. The major factor is that there is a world shortage of IP addresses. As the Internet has grown, assigning perfectly good network addresses to private networks came to be seen as a waste. Under the Network Address Translation (NAT) standard, certain IP addresses were set aside for reuse by private networks. In addition to reducing the number of IPv4 addresses needed, NAT also provides a layer of obscurity for the private network, because all hosts outside of the private network observe communication through the one shared IP address. NAT is not the same thing as a firewall or a proxy server, but it does contribute to security. NAT also succeeds in the ease and flexibility of network administration. It can divide a large network into several smaller ones by exposing only one IP address to the outside, which means that computers can be added, removed, or have their addresses changed without impacting external networks. Other benefits include Protocol-level protection, Automatic client computer configuration control, and Packet level filtering and routing.
Concentric Network Corporation provides complete, easy-to-use Internet business solutions for small to medium-sized companies and customized Virtual Private Network and data center services for larger organizations. Concentric's portfolio of services for small to medium-sized companies includes high-speed DSL access, Web hosting and e-commerce. For larger organizations, the company offers dedicated Web hosting services and VPN solutions that enable an organization to securely and reliably communicate with its offices, mobile sales force, business partners, vendors and customers.
Virtual Private Network presents some advantages over the traditional network technologies. VPN offers direct cost savings over leased lines or long-distance calls for remote access, savings resulting from reduced training requirements and equipment, increased flexibility, scalability, and security. The main advantage of VPN is the cost savings of Internet VPN when compared to networks built using conventional leased lines. Leased lines include tariffs that have an installation fee, a fixed monthly cost, and a mileage charge. The cost to an organization of traditional leased lines may be reasonable at first but can increase exponentially as the organization grows. As an organization grows and more companies must be added to the network, the number of leased lines required increases dramatically. VPN that utilizes the Internet avoids this problem by simply tapping into the geographically distributed access already available. Another way VPN reduces costs is by reducing the need for long-distance telephone charges for remote access. Instead of having the offsite team of a company dial into the corporate modem bank via long distance lines, the company’s VPN allows them to simply place local calls to the ISP’s POP in order to connect to the corporate network.
...vantage of the overall network design and implement usable subnets with virtual local area networks. Use encryption and encapsulation to secure communications of public segments to enable extranets and cross-Internet company traffic. Use items such as intrusion detection systems and firewalls to keep unauthorized users out and monitor activity. Taken together, these pieces can make a secure network that is efficient, manageable, and effective.
The VPN tunnel captures the traffic that flows between the smartphone and the Internet. The following Http requests are flagged against the signature rules that are applied.
SoftEther VPN is one of the world's most powerful and easy-to-use multi-protocol VPN software made by the good folks at University of Tsukuba, Japan. It runs on Windows, Linux, Mac, FreeBSD and Solaris and is freeware and open-source. You can use SoftEther for any personal or commercial use for free of charge.
After successful authentication to the website, employees will be taken to the main graphical user interface. This interface is where the majority of user interaction will occur and intranet websites can be accessed. The layout will be composed of links to the eight websites to which users have access. Since authentication to the main corporate VPN has already taken place, each site will no longer require a separate username and password combination. Each website that the user browses to will host all information related to that site. Users will have the ease of returning to the main VPN homepage at anytime by clicking on the "home" tab that will be displayed on all pages.
Computers that reside in this type of network will need to be setup appropriately to avoid issues and receive information from the latest source. And in order to guarantee business progression and future development, companies will need to cautiously develop some sort of plan for their company networks. This is just one option of many solutions for transitioning from IPv4 to IPv6, but can also be costly. Once the distinctions of the two are understood, it is important to understand the advantages that the Network Address Translation has to offer. NAT is able to link a great number of hosts to the worldwide Internet by utilizing one public IP address.
VPN (Virtual Private Network) is essentially a secure network over a public network, like the Internet, or a private network that the service provider owns. It prevents the IP addresses of users from being visible to others on the Internet.
Peer-to-peer networks should be installed in homes or in very small businesses where employees interact regularly. They are inexpensive to set up. However, they offer almost no security. On the other hand, client-server networks can become as big as we need them to be and they can support millions of users and offer elaborate security measures.
Cloud Computing is an up and coming strategy that could create millions of jobs while allowing companies to become more profitable. How does Cloud Computing work? The basis of Cloud Computing is having data, software, platforms or networks stored and executed by an outside source and then streaming the output to your electronic device.(McKendrick, J. 2012 march 3) In this paper I will address the following three topics: the history and basis of Cloud Computing, the three main features of Cloud Computing, and the three network types used of Cloud Computing.
I experienced that when I want to connect to the Bilkent Virtual Private Network, I have connection problems and I conducted a survey to see whether this is common problem or not. I asked the question “Are you have connection problem to the Bilkent VPN server?" the answer is clearly indicates that this problem is not use related problem. It is totally server related problem because %74 of participants votes for "yes" [5]. Since the Bilkent VPN has a vital importance to complete numerous tasks, solving this problem has a direct relation with increasing performance of the Bilkent students. This proposal intends to examine the factors creating a connection problem and investigates possible solutions to change this negative state by taking cost and duration of the implementation into account.
Berean¡¦s existing network infrastructure is wire line, and uses a T1. Remote users access the network through a dial-up modem pool. Berean¡¦s wire line network model severely limits the accessibility and effectiveness of the Berean network. For example, employees in Berean facilities are unable to access the network easily from meetings, the cafeteria, or anywhere other than their offices. In addition, the effectiveness of remote users is limited by the slow speed of present-day dial-up modem connections.