RFIntranet VPN vs. Extranet VPN: Differences Explained
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This article breaks down the differences between Intranet VPNs and Extranet VPNs. VPN stands for Virtual Private Network, a technology that creates a secure connection for internet users. It essentially extends a private network across the public internet while providing a high level of security, preventing data intrusion or interception.
There are three main VPN topologies:
- Remote Access VPN
- Intranet VPN
- Extranet VPN
Intranet VPN
An Intranet VPN provides a secure connection between clients and servers within a restricted computer network. It leverages the World Wide Web (WWW) and security protocols like IPsec and GRE to achieve this secured communication.
Figure 1: Intranet VPN
Extranet VPN
An Extranet VPN expands upon the Intranet VPN, extending access to authorized external users. Essentially, it allows external partners, vendors, or customers to securely access resources on the Intranet VPN.
Figure 2: Extranet VPN
Extranet VPNs also utilize IPsec/GRE at the network layer. They also use protocols like L2TP/L2F at the data link layer. Connection to an Extranet VPN can be established via dial-up lines over PSTN. A Network Access Server (NAS) component is often required to interface between the dial-up line and the Extranet VPN network.
Intranet VPN vs. Extranet VPN: Key Differences Summarized
| Feature | Intranet VPN | Extranet VPN |
|---|---|---|
| Scope | Securely connects users within an organization. | Securely connects authorized external users (partners, vendors, customers) to an organization’s intranet. |
| Access | Internal network access only. | Grants limited access to specific intranet resources for external users. |
| User Base | Employees, internal staff. | Employees, partners, vendors, and authorized customers. |
| Connectivity | Typically utilizes existing network infrastructure. | May involve dial-up connections, requiring a NAS component. |
