Inserts or deletes Predicate objects in a rule and updates the
RateLimit in the rule.
waf_update_rate_based_rule(RuleId, ChangeToken, Updates, RateLimit)[required] The RuleId of the RateBasedRule that you want to update. RuleId is
returned by CreateRateBasedRule and by ListRateBasedRules.
[required] The value returned by the most recent call to GetChangeToken.
[required] An array of RuleUpdate objects that you want to insert into or delete
from a RateBasedRule.
[required] The maximum number of requests, which have an identical value in the
field specified by the RateKey, allowed in a five-minute period. If
the number of requests exceeds the RateLimit and the other predicates
specified in the rule are also met, AWS WAF triggers the action that is
specified for this rule.
svc$update_rate_based_rule(
RuleId = "string",
ChangeToken = "string",
Updates = list(
list(
Action = "INSERT"|"DELETE",
Predicate = list(
Negated = TRUE|FALSE,
Type = "IPMatch"|"ByteMatch"|"SqlInjectionMatch"|"GeoMatch"|"SizeConstraint"|"XssMatch"|"RegexMatch",
DataId = "string"
)
)
),
RateLimit = 123
)
Each Predicate object identifies a predicate, such as a ByteMatchSet
or an IPSet, that specifies the web requests that you want to block or
count. The RateLimit specifies the number of requests every five
minutes that triggers the rule.
If you add more than one predicate to a RateBasedRule, a request must
match all the predicates and exceed the RateLimit to be counted or
blocked. For example, suppose you add the following to a
RateBasedRule:
An IPSet that matches the IP address 192.0.2.44/32
A ByteMatchSet that matches BadBot in the User-Agent header
Further, you specify a RateLimit of 15,000.
You then add the RateBasedRule to a WebACL and specify that you want
to block requests that satisfy the rule. For a request to be blocked, it
must come from the IP address 192.0.2.44 and the User-Agent header
in the request must contain the value BadBot. Further, requests that
match these two conditions much be received at a rate of more than
15,000 every five minutes. If the rate drops below this limit, AWS WAF
no longer blocks the requests.
As a second example, suppose you want to limit requests to a particular
page on your site. To do this, you could add the following to a
RateBasedRule:
A ByteMatchSet with FieldToMatch of URI
A PositionalConstraint of STARTS_WITH
A TargetString of login
Further, you specify a RateLimit of 15,000.
By adding this RateBasedRule to a WebACL, you could limit requests
to your login page without affecting the rest of your site.