DefensePro User Guide
Security Configuration
120
Document ID: RDWR-DP-V0602_UG1201
DoS Shield profiles prevent the following:
•
Known TCP, UDP, and ICMP floods
•
Known attack tools available in the Internet
•
Known floods created by BOTs, which are automated attacks
DoS Shield protection uses signatures from the Radware Signatures database. This database is
continuously updated and protects against all known threats.
Radware Signature profiles include all DoS Shield signatures as part of the signature database and
Radware predefined profiles that already include DoS Shield protection. To create a profile that
includes DoS Shield protection, you configure a profile with the Threat Type attribute set to Floods.
Radware also supplies a predefined profile, the All-DoS-Shield profile, which provides protection
against all known DoS attacks. The All-DoS-Shield profile is applied when a DoS-only solution is
required. Note that if the DoS Shield Radware-defined profile is applied, you cannot apply other
Signature profiles in the same security policy.
To prevent denial of service, DoS Shield samples traffic flowing through the device and limits the
bandwidth of traffic recognized as a DoS attack with predefined actions.
Most networks can tolerate sporadic attacks that consume negligible amounts of bandwidth. Such
attacks do not require any counter action. An attack becomes a threat to the network when it starts
to consume large amounts of the network’s bandwidth. DoS Shield detects such events using an
advanced sampling algorithm for optimized performance, acting automatically to solve the problem.
The DoS Shield considers two protection states:
•
Dormant state—Indicates that Sampling mechanism is used for recognition prior to active
intervention. A protection in Dormant state becomes active only if the number of packets
entering the network exceeds the predefined limit.
•
Active state—Indicates that the action is implemented on each packet matching the Attack
Signature, without sampling.
DoS Shield counts packets matching Dormant and Active states. Samples of the traffic are compared
with the list of protections in Dormant state. When a specified number of packets is reached, the
status of the protection changes to Active.
The DoS Shield module uses two processes working in parallel. One process statistically monitors
traffic to check if any dormant protection has become active. Then, when DoS Shield detects the
protection as active, the module compares each packet that passes through the device to the list of
Currently Active Protections. The module compares some of the packets that do not match the
Active signature with the Dormant protections list. The module forwards the rest of the packets to
the network without inspection.
In DefensePro, to configure DoS Shield protection, you must enable Signature Protection. For more
information, see
Configuring Global Signature Protection, page 119
To configure DoS Shield protection
1. In the Configuration perspective Security Settings tab navigation pane, select DoS Shield.
2. Configure the parameters; and then, click
(Submit) to submit the changes.
Summary of Contents for DefensePro 6.02
Page 1: ...DefensePro User Guide Software Version 6 02 Document ID RDWR DP V0602_UG1201 January 2012 ...
Page 2: ...DefensePro User Guide 2 Document ID RDWR DP V0602_UG1201 ...
Page 20: ...DefensePro User Guide 20 Document ID RDWR DP V0602_UG1201 ...
Page 28: ...DefensePro User Guide Table of Contents 28 Document ID RDWR DP V0602_UG1201 ...
Page 116: ...DefensePro User Guide Device Network Configuration 116 Document ID RDWR DP V0602_UG1201 ...
Page 302: ...DefensePro User Guide Real Time Security Reporting 302 Document ID RDWR DP V0602_UG1201 ...
Page 308: ...DefensePro User Guide Administering DefensePro 308 Document ID RDWR DP V0602_UG1201 ...
Page 324: ...DefensePro User Guide Troubleshooting 324 Document ID RDWR DP V0602_UG1201 ...
