An extranet is another type of logical network, which allows a business to connect with suppliers, vendors, customers, stockholders or others related to its business. An extranet is usually run over the Internet, often using a VPN for security. Alternatively, some companies limit their extranet functionality to data exchange via SSL-protected web pages that can only be accessed by authorized parties, and do not implement a VPN. The extranets primary components are normally situated within the companys internal network, allowing limited access to some corporate resources to those outside the organization on a need-to-know basis, and allowing corporate staff to access limited resources on other organizations networks as needed.
If you are employing a VPN for your intranet, you may wish to employ a second VPN for your extranet, to best separate this restricted public access traffic from your completely internal traffic.
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