Dell PowerEdge 4200 Series, Administrator'S Manual

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258 | SRA 6.0 Administrator’s Guide
To add a rule manually, you create a rule chain and then add rules within it. A rule chain is a
collection of rules and includes additional attributes such as the severity rating, name,
description, hit counters for rate limiting, and the action to take when the rule chain matches
some traffic.
Figure 40 shows all rule chain fields.
Figure 40 Rule Chains
For example, custom rules and rule chains can be used to distinguish between legitimate and
illegitimate traffic as defined by a Web application that is using a certain URI or running on a
certain portal. One rule in the chain is configured to match the URI or portal host name, while
another rule is created that matches an undesirable value for another element of the HTTP(S)
traffic. When the rule chain (both rules) matches some traffic, the configured action is
performed to block or log the bad traffic from that URI or portal. When the request is blocked,
the user sees a custom block page such as that in
Figure 41 .
Figure 41 Block Page