Definitions
Implementation of a free firewall based on an IP filter

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TE7702 V1 Article

Definitions
Implementation of a free firewall based on an IP filter

Author : Laurent LEVIER

Review date: January 1, 2023 | Lire en français

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1. Definitions

1.1 Perimeter

In IT security, the perimeter is the area over which an entity has physical and logical access control.

Example

a company's office network connected to the Internet can constitute a perimeter, even if this network is deployed on several distinct geographical sites and in several countries.

A perimeter is often made up of several "sub-perimeters", as the level of risk varies according to the different networks making up the company. For example, as illustrated in figure 1 , a demilitarized zone, the office network, the accounting department network and the R&D department network make up the...

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