Avaya Business Secure Router 222 Configuration - Basics Bedienungsanleitung PDF herunterladen (Seite 158)

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158 Chapter 10 Firewalls

NN47922-500

Figure 46 Business Secure Router firewall application

Denial of Service

Denial of Service (DoS) attacks are aimed at devices and networks with a

connection to the Internet. Their goal is not to steal information, but to disable a

device or network so users no longer have access to network resources. The

Business Secure Router is preconfigured to automatically detect and thwart

currently known DoS attacks.

Basics

Computers share information over the Internet using a common language called

TCP/IP. TCP/IP, in turn, is a set of application protocols that perform specific

functions. An extension number, called the TCP port or UDP port, identifies these

protocols, such as HTTP (Web), FTP (File Transfer Protocol) and POP3 (E-mail).

For example, Web traffic uses TCP port 80, by default.

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