SMC Networks BARRICADE SMC7901WBRA2 B1, Руководство пользователя

Страница: 98 / 150

C
HAPTER
8
| Firewall Configuration
DoS
– 98 –
D
O
S
Denial of Service (DoS) is an attempt by a hacker to flood an IP address,
domain, or server with repeated external communincation requests,
effectively saturating the system with an information flood that renders it
slow or effectively inoperable for genuine users to access it. DoS attacks
are also referred to as non-intrusion attacks, the goal of which is to cripple
your system but not steal data.
The DoS Settings on the ADSL Router enable the user to block many of the
common DoS attacks a network might suffer.
Figure 55: DoS Settings
The following items are displayed on this page:
◆
Enable DoS Blocking — Activates the DoS check boxes and
configurable parameters associated with them. (Default: Disabled)
■
Whole System Flood: SYN: Prevents a SYN (synchronise) attack
in which the process of the common three way TCP handshake is
interupted and the acknowledge response gets sent to a maicious IP
address, or the system is flooded with false SYN requests.