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Network Security Principles and Practices by Saadat Malik

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Corporate Internet Module

The Corporate Internet module provides internal users with connectivity to Internet services and Internet users access to information on public servers. Traffic also flows from this module to the VPN and remote access module where VPN termination takes place. This module is not designed to serve e-commerce type applications. Refer to the “E-Commerce Module” section later in this document for more details on providing Internet commerce.

Figure B-18. Corporate Internet Traffic Flow

Key Devices

  • SMTP server— acts as a relay between the Internet and the Internet mail servers—inspects content

  • DNS server— serves as authoritative ...

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