January 29, 2010, Newsletter Issue #221: Extranet Design

Tip of the Week

An extranet is a private network that connects to the Internet. An extranet is often part of a company's or organization's intranet, which is a private network that has no connection to the Internet.

The extranet's purpose can be to provide users with access to the Internet, to act as a gateway from the intranet users to the Internet, or to act as a firewall/guardian for the overall intranet.

Extranet design must be done while keeping in mind that the Internet will have access to the network and all devices on it. Thus, security and protection of the users and their data must be a top priority in extranet design and development. Some designers, keeping security in mind, will design the extranet with hardware and software that allows intranet access to the Internet, but filters access from the Internet to the intranet to a very select group of computers or ports.

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