A Virtual Private Network (VPN) that exists over a public network infrastructure like the internet is both cheaper and more flexible than a network comprising dedicated semi-permanent links such as leased-lines. In contrast to leased-line private networks, the topology of such a VPN can be altered on-the-fly, and its lightweight nature means that creation and modification can take place over ve...

Virtual Private Networks (VPNs) provide customers with predictable and secure network connections over a shared network. The recently proposed hose model for VPNs allows for greater flexibility since it permits traffic to and from a hose endpoint to be arbitrarily distributed to other endpoints. In this paper, we develop novel algorithms for provisioning VPNs in the hose model. We connect VPN e...

Encryption Protocols e.g., HTTPS is utilized to secure the traffic between servers and clients for YouTube other video streaming services, further communication, VPNs are used. However, these protocols not sufficient hide identity of videos from someone who can sniff network traffic. The present work explores methodologies features identify in a VPN non-VPN To such videos, side-channel attack u...

Virtual private networks (VPNs) provide customers with a secure and manageable communication environment. The allocation of bandwidth for VPNs to meet the requirements specified by customers is now one of the most important research issues in the field of traffic engineering. A VPN resource-provisioning model called hose-model was developed to provide customers with a flexible and convenient wa...

Even though IP VPN has practically proven itself to be a cost-effective solution, the lack of centralized network management capabilities of current IP VPN deployment makes the management of growing VPN networks an extremely tedious procedure. This paper proposes to use policy-based network management method to address this challenge. Firstly, a policy-based IP VPN management architecture is pr...

In the course of carrying out its mission the primary challenge facing e-gov is how to deliver secure online services to businesses and citizens. For this paper, the Virtual Private Network (VPN) will be the solution selected to deal with this challenge. VPN can resolve these issues by simplifying and speeding the delivery of on-line services and information to citizens, businesses, and inter-a...

BGP/MPLS VPN is a mechanism defined in IETF RFC 2547 that allows service providers to use their IP backbone to provide VPN services. This mechanism is based on using BGP to distribute VPN routing information to the routers in the backbone network and using MPLS to forward VPN traffic. MPLS tunnels are created dynamically when needed, which relieves service providers of pre-provisioning tens of ...

However, growing VPN sizes and a dynamic behavior of VPN gateways and clients, e.g., for mobility reasons or perhaps reactions due to denial-of-service (DoS) attacks, make a manual configuration of large, dynamic VPN complicated and expensive. First, the administrative overhead is subject to a quadratic growth with the number of VPN devices, if each VPN device shall be able to communicate with ...

Virtual Private Networks (VPNs) are widely recommended to provide security for otherwise unsecured industrial and SCADA communication protocols. VPNs provide confidentiality, integrity, and availability and are often considered secure. However, implementation vulnerabilities and protocol flaws have exposed VPN weaknesses in many deployments. In this work, we use probabilistic modeling to evalua...