In this paper, we propose and implementVirtual Network Service (VNS), a value-added network service for deploying virtual private networks (VPN) in a managed wide area IP network. The key feature of VNS is its capability of providing a customer with a VPN that is customizable with management capabilities and performance properties comparable to a dedicated physical network. In addition, VNS ens...

The internet considered a tool that effectively ensures communication globally has been hindered by hackers and crackers continuously. In so doing, a multitude of network facilitated tools such as firewalls, virtual private networks (VPN) and a variety of antivirus software packages has been enabled for dealing with such predicaments. However, more often than not these facilitated tools are mar...

Introduction Encryption has been used as a method of protecting computer privacy since 1977. Secret communication plays an increasing role in organizations especially banking, industry, commerce, telecommunication etc. The basic idea of encryption is to modify the network traffic in such a way that its content can be reconstructed only by a legal recipient. This has been central to the setting ...

The proliferation of computers has spurred the creation of large networks even in small organisations. These networks comprise great numbers of elements such as routers, switches, servers etc. located in multiple locations. The administration of these elements has to be carried out usually from a central location over the existing network infrastructure. Starting from the premise that the organ...

This paper presents personal networks, which integrate a VPN and the per-VPN execution environments of the hosts included in the VPN. The key point is that each execution environment called a portspace is bound to only one VPN, i.e., single-homed. Using this feature of portspaces, personal networks address several problems at multi-homed hosts that use multiple VPNs. Information flow is separat...

The evolution of an open market for telecommunication services provides a wide range of opportunities for the provision of value added services by providers other than public network operators. One service already available today is that of a Virtual Private Network that provide dispersed corporate sites with wide area data and telephony capabilities using public network services. The introduct...

An important class of virtual private networks (VPNs) builds secure tunnels at the transport layer leveraging TCP or UDP. Multipath TCP (MPTCP), an ongoing IETF effort that has been adopted into Linux and iOS, extends TCP to allow data to be delivered over multiple network interfaces and paths simultaneously. In this paper, using a testbed that can emulate a range of path characteristics betwee...

TELECOMMUNICATIONS NETWORKS ARE BECOMING MORE COMPLEX. Traditional voice networks are now being augmented by a variety of data, integrated services and broadband networks. Not only are the networks becoming more complex, but the services they offer are increasingly sophisticated and valuable. Mobile services, international direct dialling, intelligent network services, virtual private networks ...