June 25, 2010, Newsletter Issue #241: Extranet Network Design

Tip of the Week

An extranet network must be designed with security being the highest priority. Because it connects to the internet, any devices on the network must have firewalls installed on them. Additionally, the entire extranet network should connect through a central server to the Internet, so that all traffic going to and from the extranet is filtered through a second additional firewall.

This filtering should be performed at the port level so that the computers on the intranet cannot have their ports accessed by intruders coming in from the outside. Other important aspects of extranet network design include restricting the access of the extranet users and limiting the rights they have on their computers.

If any users have information on their computers that is considered confidential, they should encrypt their computers so that intruders from the Internet cannot access the data even if the extranet's firewall is broken through.

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