The life cycle phases of an IPSec Tunnel in a virtual private network message integrity to detect and reject any instances of tampering with transmitted messages.sender authentication to prevent unauthorized users from accessing the VPN.confidentiality such that even if the network traffic is sniffed at the packet level (see network sniffer or deep packet inspection), an attacker would see only encrypted data, not the raw data.To prevent disclosure of private information or data sniffing, VPNs typically allow only authenticated remote access using tunneling protocols and secure encryption techniques. VPNs cannot make online connections completely anonymous, but they can increase privacy and security. the OSI layer they present to the connecting network, such as Layer 2 circuits or Layer 3 network connectivity.the type of topology of connections, such as site-to-site or network-to-network.
the tunnel's termination point location, e.g., on the customer edge or network-provider edge.the tunneling protocol used to tunnel the traffic.However these technologies are not mutually exclusive and, in a significantly complex business network, may be combined to enable remote access to resources located at any given site, such as an ordering system that resides in a data center. Typically, individuals interact with remote access VPNs, whereas businesses tend to make use of site-to-site connections for business-to-business, cloud computing, and branch office scenarios. An intranet site-to-site VPN describes a configuration where the sites connected by the VPN belong to the same organization, whereas an extranet site-to-site VPN joins sites belonging to multiple organizations. Extranet-based site-to-site In the context of site-to-site configurations, the terms intranet and extranet are used to describe two different use cases. The interconnecting link may run over a dissimilar intermediate network, such as two IPv6 networks connected over an IPv4 network. This configuration expands a network across geographically disparate offices, or connects a group of offices to a data center installation. Site-to-site A site-to-site configuration connects two networks. This may be employed for remote workers, or to enable a mobile worker to access important tools without exposing them to the public Internet. This type provides access to an enterprise network, such as an intranet. Remote access A host-to-network configuration is analogous to connecting a computer to a local area network. Virtual private networks may be classified into several categories: Types VPN classification tree based on the topology first, then on the technology used VPN connectivity overview, showing intranet site-to-site and remote-work configurations used together From a user perspective, the resources available within the private network can be accessed remotely. A VPN available from the public Internet can provide some of the benefits of a wide area network (WAN). Ī VPN is created by establishing a virtual point-to-point connection through the use of tunneling protocols over existing networks. Encryption is common, although not an inherent part of a VPN connection. VPNs are also used to bypass internet censorship. The benefits of a VPN include security, reduced costs for dedicated communication lines, and greater flexibility for remote workers. Ī VPN can extend a private network (one that disallows or restricts public access), in such a way that it enables users of that network to send and receive data across public networks as if the public networks' devices were directly connected to the private network. ( Learn how and when to remove this template message)Ī virtual private network ( VPN) is a mechanism for creating a secure connection between a computing device and a computer network, or between two networks, using an insecure communication medium such as the public Internet. ( March 2023) ( Learn how and when to remove this template message)
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