Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document addresses security aspects pertaining to Provider-Provisioned Virtual Private Networks (PPVPNs). First, it describes the security threats in the context of PPVPNs and defensive techniques to combat tho...

The term "VPN," or Virtual Private Network, has become almost as recklessly used in the networking industry as has "QoS" (Quality of Service) to describe a broad set of problems and "solutions," when the objectives themselves have not been properly articulated. This confusion has resulted in a situation where the popular trade press, industry pundits, and vendors and consumers of networking tec...

The liberalisation of the telecommunications industry has resulted in a proliferation of new services and services providers. This is particularly the case in the rapidly expanding IPbased services market. Providers include ISPs, Virtual Private Network (VPN) and application service providers, and backbone operators. The final service set delivered to the customer will result from the combinati...

The term “VPN,” or Virtual Private Network, has become almost as recklessly used in the networking industry as has "QoS" (Quality of Service) to describe a broad set of problems and "solutions," when the objectives themselves have not been properly articulated. This confusion has resulted in a situation where the popular trade press, industry pundits, and vendors and consumers of networking tec...

This paper describes an efficient way to implement managed bandwidth services. The proposed solution is based on MPLS technology and especially with the creation of virtual private networks. The virtual private networks will be layer 3 VPNs (IP VPNs) and are described all the mechanisms and the MPLS features that are necessary for the MBS service implementation. The paper also describes how the...

IP based Virtual Private Networks (VPNs) are being deployed as the solution of choice for site-to-site communication for a large number of enterprises. The provider networks that support these services are faced with unique challenges in terms of network planning. There is a lot of value in understanding the characteristics of VPNs from the perspective of planning, provisioning and maintenance ...

In this article we describe recent work done in building a university-wide grid at the University of Cambridge based on the Condor middleware [1]. Once the issues of stakeholder concerns (e.g. security policies) and technical problems (e.g. firewalls and private IP addresses) have been taken into account, a solution based on two separate Condor environments was decided on. The first of these is...

Dynamic Multipoint Virtual Private Network “DMVPN” is a solution for the dynamic creation of virtual Private IP tunnels between multiple sites automatically, quickly and with the least configuration. Routing protocols are component technologies' main parts of the DMVPN solution, they ensure the smooth establishment of tunnels and have a major impact on network’s behavior and transported applica...

relationship between public and private sector is becoming an increasingly important issue in management of agricultural extension services. the need for a strong linkage could be identified as the gap between desirable and current situation. in this research, the differences among current and desirable situation in six diverse dimensions was calculated. the current and desirable situation was ...