04-+Extranet+Overview

Extranet Overview

• Definition: Extranet refers to a controlled network within an organization that uses the internet to connect with external users such as customers and suppliers. It enables collaboration and sharing of information across business boundaries.

• Implementation:

  • Typically implemented as a Virtual Private Network (VPN) for secure communication.

  • Extranets utilize the internet while ensuring information security, mitigating risks associated with public networks.

VPN Security Features

• Internet Protocol Security (IPSEC):

  • A protocol used by VPNs to secure transactions by adding an extra layer of security above the TCP/IP protocol.

  • Encapsulates the IP packet, creating a new packet for secure transmission.

  • The encapsulation happens at boundary routers compliant with IPSEC.

• Tunneling:

  • The process of sending messages through a VPN Tunnel, ensuring privacy and security during data transmission.

  • Requires an encryption key for packet encapsulation.

Benefits of Extranet

• Collaborative Platform: Facilitates collaboration among employees, suppliers, business partners, and customers.

• Scalable for Businesses: Effective for organizations of all sizes, allowing them to leverage external resources and expertise.

Issues Related to Extranet

• Hosting:

  • Requires decisions on where to host extranet pages, primarily with two options:

    1. On Own Server:

       • Benefits include control and customization but requires high bandwidth and additional firewall security, complicating the security setup.

    2. Internet Service Provider (ISP):

       • Easier and less costly to host, similar to standard web pages.

• Security:

  • Additional complexities arise from needing robust firewall mechanisms when hosting on own servers, increasing workload for IT teams.

• Accessing Issues:

  • Dependency on internet connection for accessing information; unlike intranet, which can function without it.

• Decreased Interaction:

  • May lead to reduced face-to-face communication among customers, partners, and suppliers, potentially impairing relationship development.

Extranet vs. Intranet