Chapter 10 Firewalls
P-660HWP-Dx User’s Guide
39
Figure 94
SYN Flood
• In a
LAND Attack
, hackers flood SYN packets into the network with a spoofed source IP
address of the targeted system. This makes it appear as if the host computer sent the
packets to itself, making the system unavailable while the target system tries to respond to
itself.
7
A
brute-force
attack, such as a "Smurf" attack, targets a feature in the IP specification
known as directed or subnet broadcasting, to quickly flood the target network with
useless data. A Smurf hacker floods a router with Internet Control Message Protocol
(ICMP) echo request packets (pings). Since the destination IP address of each packet is
the broadcast address of the network, the router will broadcast the ICMP echo request
packet to all hosts on the network. If there are numerous hosts, this will create a large
amount of ICMP echo request and response traffic. If a hacker chooses to spoof the
source IP address of the ICMP echo request packet, the resulting ICMP traffic will not
only clog up the "intermediary" network, but will also congest the network of the
spoofed source IP address, known as the "victim" network. This flood of broadcast
traffic consumes all available bandwidth, making communications impossible.
Figure 95
Smurf Attack
Содержание 802.11g HomePlug AV ADSL2+ Gateway P-660HWP-Dx
Страница 2: ......
Страница 7: ...Safety Warnings P 660HWP Dx User s Guide 39 ...
Страница 8: ...Safety Warnings P 660HWP Dx User s Guide 40 ...
Страница 10: ...Contents Overview P 660HWP Dx User s Guide 36 ...
Страница 20: ...Table of Contents P 660HWP Dx User s Guide 44 ...
Страница 32: ...List of Tables P 660HWP Dx User s Guide 40 ...
Страница 33: ...35 PART I Introduction Introducing the P 660HWP Dx 35 Introducing the Web Configurator 43 ...
Страница 34: ...36 ...
Страница 41: ...Chapter 1 Introducing the P 660HWP Dx P 660HWP Dx User s Guide 41 Figure 7 P 660HWP Dx with ISDN ...
Страница 42: ...Chapter 1 Introducing the P 660HWP Dx P 660HWP Dx User s Guide 42 ...
Страница 56: ...Chapter 2 Introducing the Web Configurator P 660HWP Dx User s Guide 48 ...
Страница 57: ...35 PART II Wizards Wizard Setup for Internet Wireless Access 59 Bandwidth Management Wizard 73 ...
Страница 58: ...36 ...
Страница 78: ...Chapter 4 Bandwidth Management Wizard P 660HWP Dx User s Guide 54 ...
Страница 80: ...36 ...
Страница 98: ...Chapter 5 WAN Setup P 660HWP Dx User s Guide 52 ...
Страница 142: ...Chapter 8 Powerline P 660HWP Dx User s Guide 42 ...
Страница 155: ...35 PART IV Security Firewalls 157 Firewall Configuration 169 Content Filtering 191 Certificates 195 ...
Страница 156: ...36 ...
Страница 176: ...Chapter 11 Firewall Configuration P 660HWP Dx User s Guide 54 Figure 99 Firewall Edit Rule ...
Страница 190: ...Chapter 11 Firewall Configuration P 660HWP Dx User s Guide 68 ...
Страница 194: ...Chapter 12 Content Filtering P 660HWP Dx User s Guide 72 ...
Страница 218: ...36 ...
Страница 222: ...Chapter 14 Static Route P 660HWP Dx User s Guide 38 ...
Страница 238: ...Chapter 16 Dynamic DNS Setup P 660HWP Dx User s Guide 38 ...
Страница 250: ...Chapter 17 Remote Management Configuration P 660HWP Dx User s Guide 46 ...
Страница 262: ...Chapter 18 Universal Plug and Play UPnP P 660HWP Dx User s Guide 58 ...
Страница 263: ...35 PART VI Maintenance and Troubleshooting System 265 Logs 271 Tools 289 Diagnostic 295 Troubleshooting 297 ...
Страница 264: ...36 ...
Страница 270: ...Chapter 19 System P 660HWP Dx User s Guide 40 ...
Страница 288: ...Chapter 20 Logs P 660HWP Dx User s Guide 52 ...
Страница 294: ...Chapter 21 Tools P 660HWP Dx User s Guide 40 ...
Страница 304: ...36 ...
Страница 340: ...Appendix C Internal SPTGEN P 660HWP Dx User s Guide 50 ...
Страница 364: ...Appendix E IP Subnetting P 660HWP Dx User s Guide 42 ...
Страница 368: ...Appendix F Command Interpreter P 660HWP Dx User s Guide 38 ...
Страница 388: ...Appendix K Legal Information P 660HWP Dx User s Guide 38 ...
Страница 394: ...Appendix L Customer Support P 660HWP Dx User s Guide 40 ...
Страница 402: ...Index P 660HWP Dx User s Guide 42 ...