ECS4660-28F_Management Guide-R03

C HAPTER 29 | General Security Measures
Denial of Service Protection
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EXAMPLE
Console#show ip arp inspection vlan 1
VLAN ID DAI Status ACL Name ACL Status
-------- --------------- -------------------- --------------------
1 disabled sales static
Console#
DENIAL OF SERVICE PROTECTION
A denial-of-service attack (DoS attack) is an attempt to block the services
provided by a computer or network resource. This kind of attack tries to
prevent an Internet site or service from functioning efficiently or at all. In
general, DoS attacks are implemented by either forcing the target to reset,
to consume most of its resources so that it can no longer provide its
intended service, or to obstruct the communication media between the
intended users and the target so that they can no longer communicate
adequately.
This section describes commands used to protect against DoS attacks.
dos-protection land This command protects against DoS LAND (Local Area Network Denial)
attacks in which hackers send spoofed-IP packets where the source and
destination address are the same, thereby causing the target to reply to
itself continuously. Use the no form to disable this feature.
SYNTAX
[no] dos-protection land
DEFAULT SETTING
Enabled
COMMAND MODE
Global Configuration
Table 124: DoS Protection Commands
Command Function Mode
dos-protection land Protects against DoS LAND attacks GC
dos-protection tcp-null-scan Protects against DoS TCP-null-scan attacks GC
dos-protection tcp-syn-fin-scan Protects against DoS TCP-SYN/FIN-scan attacks GC
dos-protection tcp-xmas-scan Protects against DoS TCP-XMAS-scan attacks GC
show dos-protection Shows the configuration settings for DoS
protection
PE