Private access to corporate servers from Internet can be achieved using various security mechanisms. This article presents a network access control mechanism that employs a policy management architecture empowered with dynamic firewalls. With the existence of such an architecture, system and/or network administrators do not need to reconfigure firewalls when there is a location change in user s...

As Multiprotocol Label Switching (MPLS) is becoming a more widespread and developing technology for providing Traffic Engineering and high speed networking. Most of the internet service provider are deploying MPLS VPN technology for Enterprise Network, to provide Security and Quality of Service (QoS) guarantees to costumer sites . MPLS architecture security have been a increasing concern to Ser...

A Virtual Private Network (VPN) provides private network connections over a publicly accessible shared network. The effective allocation of bandwidth for VPNs assumes significance in the present scenario due to varied traffic. Each VPN endpoint specifies bounds on the total amount of traffic that it is likely to send or receive at any time. The network provider tailors the VPN so that there is ...

The article is devoted to the study of such technology as IPsec VPN. role this in field information and communication technologies quite significant. Firstly, VPN supports many modern encryption algorithms authentication methods. Secondly, supported by vendors, which allows you deploy based on equipment from different manufacturers. Thirdly, does not require much performance hardware. Fourth, e...

In the emerging context of mobile Internet, Secure VPN is becoming a very important service. Provision of this problem is among the subjects of IST project INTERNODE. Besides provision of the necessary technical means, charging and accounting also are key related issues. These issues are the subject of this paper. Only by dealing with them successfully, Secure VPN providers can recover their pr...

Major cloud providers offer networks of virtual machines with private IP addresses as a service on the cloud. To isolate the address space of different customers, customers are required to tunnel their traffic to a Virtual Private Network (VPN) gateway, which is typically a middlebox inside the cloud that internally tunnels each packet to the correct destination. To improve performance, an incr...

We are moving towards an era where location information will be necessary for access control. The use of location information can be used for enhancing the security of an application, for critical applications, such as the military. A formal model for location-based access control is needed that increases the security of the application and ensures that the location information cannot be exploi...

This paper focuses on the modeling and performance analysis for IPv6 traf®c with multi-class QoS in virtual private networks (VPN). The multi-class QoS is implemented on differentiated service basis using priority scheme of 4 bits de®ned in the packet header of IPv6. A VPN-enabled IP router is modeled as a tandem queuing system in which each output link consists of two parallel priority output ...

The term Virtual Private Network (VPN) encompasses a wide array of diverse technologies and network architectures. All VPNs should provide users with the isolation and security associated with private networks, but at lower costs made possible by implementing these networks over some type of shared infrastructure. Provider provisioned VPN allow enterprises to outsource their private backbone ne...

Internet Protocol (IP) examines only the packet header to forward the packet but it does not examine the data in it. As internet is open to public, the seeking for sensitive data by the attacker has increased. It has become a necessity to protect data through the Internet. Virtual Private Network (VPN) is a popular service to logically construct private network using the existing public infrast...