Virtual Private Networks (VPNs) are designed to provide secure data exchange between remote users and remote LANs of an organization over networks with a low level of trust (for example, over the Internet).
VPNs allow you to provide remote mobile users with secure access to corporate LANs and partners and customers with secure access to specific internal information resources of the organization by creating cryptographically secure tunnels for sending data from one endpoint to another.
The main elements for building a VPN are cryptographic devices located at the entrances to remote LANs and on computers of remote (mobile) users.
Implementation Options
- VPN based firewalls. The advantage of this option is that it uses only one software and hardware complex to protect data flows for all nodes of each LAN.
- VPN based service built into the operating system of network nodes. This option is the most accessible, implemented by standard OS tools. However, a firewall is still needed to protect the hosts themselves.
- VPN based on unique cryptographic gateways between internal and public networks, such as router-based VPN like diebestenvpn with cryptographic capabilities. Systems of this type are characterized by high performance, do not require complex administration, but at the same time are relatively expensive.
Types of Virtual Private Network (A Virtual Private Network)
There are three main types of virtual private networks:
- intra corporate VPN ( Intranet VPN ) for organizing communications between branches of one organization;
- VPN with remote access (Remote Access VPN) for organizing access to the corporate network of mobile employees;
- inter-corporate VPN (Extranet VPN) to organize relationships with partners and customers.
VPN Topology
Mixed topologies are formed by peer-to-peer and client/server topologies. A mixed topology where the central server is in sync with the clients and the clients can be in sync. This topology can support an application that allows users to share project notes. Project team members often need a local copy of their data to work with. Changes made can be synchronized with the server where the changes are being pushed or with another group member sharing the changes. In this case, the two databases can perform peer-to-peer synchronization without contacting the leading site. Each VPN point can exchange traffic with every other moment belonging to this VPN—Hub and Speak or, in other words, star topology. The star topology provides the ability to access shared resources from different VPNs. In this case, all points are divided into the following types: one or more central issues, called the hub. Major points can exchange traffic with any point of this VPN. In particular, all VPN main points (hubs) form a full mesh VPN between them. Spokes can only communicate with hubs and cannot share with other spokes from other VPNs. The addressing plan must be consistent across all VPN legs.
There are two network nodes: central (main office/data center) and all others (regional offices). In this case, hub routers must have static ip addresses from the private (private) range. All points are divided into the following types: one or more central issues, called the hub. Major points can exchange traffic with any point of this VPN. In particular, all VPN main points (hubs) form a full mesh VPN between them. Spokes can only communicate with hubs and cannot share with other spokes from other VPNs. The addressing plan must be consistent across all VPN legs. There are two network nodes: central (main office/data center) and all others (regional offices). In this case, hub routers must have static ip addresses from the private (private) range. All points are divided into the following types: one or more central issues, called the hub. Main points can exchange traffic with any point of this VPN. In particular, all VPN major points (hubs) form a full mesh VPN between them. Spokes can only communicate with hubs and cannot share with other spokes from other VPNs.
The addressing plan must be consistent across all VPN legs. There are two network nodes: central (main office/data center) and all others (regional offices). In this case, hub routers must have static ip addresses from the private (private) range. In particular, all VPN central points (hubs) form a full mesh VPN between them. Spokes can only communicate with corners and cannot share with other spokes from other VPNs. The addressing plan must be consistent across all VPN legs. There are two network nodes: central (main office/data center) and all others (regional offices). In this case, hub routers must have static ip addresses from the private (private) range. In particular, all VPN central points (hubs) form a full mesh internetbeskyttelse VPN between them. Spokes can only communicate with seats and cannot share with other spokes from other VPNs. The addressing plan must be consistent across all VPN legs. There are two network nodes: central (main office/data center) and all others (regional offices). In this case, hub routers must have static IP addresses from the private (private) range.
Also Read: Virtual Private Network (VPN) Software