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Prestige 661H/HW Series User’s Guide
Chapter 11 Firewalls
132
11.3.1 Denial of Service Attacks
Figure 57
Prestige Firewall Application
11.4 Denial of Service
Denials 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 Prestige is pre-configured to automatically
detect and thwart all known DoS attacks.
11.4.1 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), POP3 (E-mail), etc. For example, Web traffic by default
uses TCP port 80.
When computers communicate on the Internet, they are using the client/server model, where
the server "listens" on a specific TCP/UDP port for information requests from remote client
computers on the network. For example, a Web server typically listens on port 80. Please note
that while a computer may be intended for use over a single port, such as Web on port 80,
other ports are also active. If the person configuring or managing the computer is not careful, a
hacker could attack it over an unprotected port.
Some of the most common IP ports are:
Содержание Prestige 661H Series
Страница 37: ...Prestige 661H HW Series User s Guide 37 List of Tables...
Страница 41: ...Prestige 661H HW Series User s Guide 41 Introduction to DSL...
Страница 51: ...Prestige 661H HW Series User s Guide 51 Chapter 1 Getting To Know Your Prestige...
Страница 67: ...Prestige 661H HW Series User s Guide 67 Chapter 3 Wizard Setup for Internet Access...
Страница 81: ...Prestige 661H HW Series User s Guide 81 Chapter 5 LAN Setup...
Страница 125: ...Prestige 661H HW Series User s Guide 125 Chapter 8 Network Address Translation NAT Screens...
Страница 143: ...Prestige 661H HW Series User s Guide 143 Chapter 11 Firewalls...
Страница 151: ...Prestige 661H HW Series User s Guide 151 Chapter 12 Firewall Configuration Figure 64 Firewall Edit Rule...
Страница 165: ...Prestige 661H HW Series User s Guide 165 Chapter 12 Firewall Configuration...
Страница 169: ...Prestige 661H HW Series User s Guide 169 Chapter 13 Content Filtering...
Страница 175: ...Prestige 661H HW Series User s Guide 175 Chapter 14 Introduction to IPSec...
Страница 203: ...Prestige 661H HW Series User s Guide 203 Chapter 15 VPN Screens...
Страница 207: ...Prestige 661H HW Series User s Guide 207 Chapter 16 Remote Management Configuration...
Страница 221: ...Prestige 661H HW Series User s Guide 221 Chapter 17 Universal Plug and Play UPnP...
Страница 227: ...Prestige 661H HW Series User s Guide 227 Chapter 18 Logs Screens...
Страница 241: ...Prestige 661H HW Series User s Guide 241 Chapter 19 Media Bandwidth Management Advanced Setup...
Страница 265: ...Prestige 661H HW Series User s Guide 265 Chapter 21 Maintenance...
Страница 275: ...Prestige 661H HW Series User s Guide 275 Chapter 23 Menu 1 General Setup...
Страница 279: ...Prestige 661H HW Series User s Guide 279 Chapter 24 Menu 2 WAN Backup Setup...
Страница 283: ...Prestige 661H HW Series User s Guide 283 Chapter 25 Menu 3 LAN Setup...
Страница 287: ...Prestige 661H HW Series User s Guide 287 Chapter 26 Wireless LAN Setup...
Страница 293: ...Prestige 661H HW Series User s Guide 293 Chapter 27 Internet Access...
Страница 307: ...Prestige 661H HW Series User s Guide 307 Chapter 29 Static Route Setup...
Страница 311: ...Prestige 661H HW Series User s Guide 311 Chapter 30 Bridging Setup...
Страница 327: ...Prestige 661H HW Series User s Guide 327 Chapter 31 Network Address Translation NAT...
Страница 343: ...Prestige 661H HW Series User s Guide 343 Chapter 33 Filter Configuration...
Страница 363: ...Prestige 661H HW Series User s Guide 363 Chapter 36 System Information and Diagnosis...
Страница 375: ...Prestige 661H HW Series User s Guide 375 Chapter 37 Firmware and Configuration File Maintenance...
Страница 381: ...Prestige 661H HW Series User s Guide 381 Chapter 38 System Maintenance...
Страница 385: ...Prestige 661H HW Series User s Guide 385 Chapter 39 Remote Management...
Страница 395: ...Prestige 661H HW Series User s Guide 395 Chapter 40 IP Policy Routing...
Страница 399: ...Prestige 661H HW Series User s Guide 399 Chapter 41 Call Scheduling...
Страница 411: ...Prestige 661H HW Series User s Guide 411 Chapter 42 VPN IPSec Setup...
Страница 415: ...Prestige 661H HW Series User s Guide 415 Chapter 43 SA Monitor...
Страница 427: ...Prestige 661H HW Series User s Guide 427 Chapter 44 Troubleshooting Figure 275 Security Setting ActiveX Controls...
Страница 431: ...Prestige 661H HW Series User s Guide 431 Appendix A...
Страница 451: ...Prestige 661H HW Series User s Guide 451 Appendix C IP Subnetting...
Страница 455: ...Prestige 661H HW Series User s Guide 455 Appendix E Command Interpreter...
Страница 461: ...Prestige 661H HW Series User s Guide 461 Appendix F Firewall Commands...
Страница 464: ...Prestige 661H HW Series User s Guide Appendix G NetBIOS Filter Commands 464...
Страница 465: ...Prestige 661H HW Series User s Guide 465 Appendix G NetBIOS Filter Commands...
Страница 478: ...Prestige 661H HW Series User s Guide Appendix H VPN Setup 478 ftp 5631148 bytes sent in 614 8Seconds 9 17Kbytes sec...
Страница 479: ...Prestige 661H HW Series User s Guide 479 Appendix H VPN Setup...
Страница 482: ...Prestige 661H HW Series User s Guide Appendix I Splitters and Microfilters 482...
Страница 483: ...Prestige 661H HW Series User s Guide 483 Appendix I Splitters and Microfilters...
Страница 537: ...Prestige 661H HW Series User s Guide 537 Appendix M Internal SPTGEN...