ADC

Examples of rate-based policies

September 10, 2024

Contributed by:

C C

This topic lists some examples of rate-based policies.

Limit the number of requests from a URL

Run the following commands to limit the number of requests per second from a URL:

add stream selector ipStreamSelector http.req.url "client.ip.src" add ns limitIdentifier ipLimitIdentifier -threshold 4 -timeSlice 1000 -mode request_rate -limitType smooth -selectorName ipStreamSelector

add responder action myWebSiteRedirectAction redirect "\"http: //www.mycompany .com/\""

add responder policy ipLimitResponderPolicy "http.req-url.contains(\"myasp.asp\") && sys.check_limit(\"ipLimitIdentifier\")" myWebSiteRedirectaction

bind responder global ipLimitResponderPolicy 100 END -type default
<!--NeedCopy-->

Cache a response for the request URL

Run the following commands to cache a response if the request URL rate exceeds 5 per 20000 milliseconds:

add stream selector cacheStreamSelector http.req.url add ns limitidentifier cacheRateLimitIdentifier -threshold 5 -timeSlice 2000 -selectorName cacheStreamSelector

add cache policy cacheRateLimitPolicy -rule "http req.method.eq(get) && sys.check_limit \"cacheRateLimitIdentifier\")" -action cache

bind cache global cacheRateLimitPolicy -priority 10
<!--NeedCopy-->

Drop a connection based on cookies

Run the following commands to drop a connection based on the cookies received in requests from www.mycompany.com if the requests exceed the rate limit:

add stream selector reqCookieStreamSelector "http req.cookie «value(\"mycookie\")" "client.ip.src.subnet(24)"

add ns limitIdentifier myLimitIdentifier -Threshold 2 -timeSlice 3000 -selectorName reqCookieStreamSelector

add responder action sendRedirectUrl redirect '\"http://www.mycompany.com\" + http.req.url' -bypassSafetyCheck YES

add responder policy rateLimitCookiePolicy "http. req.url.contains(\"www.yourcompany.com\") && sys check_limit(\"myLimitIdentifier\")" sendRedirectUrl
<!--NeedCopy-->

Drop a DNS packet from a particular IP address

Run the following commands to drop a DNS packet if the requests from a particular client IP address and DNS domain exceed the rate limit:

add stream selector dropDNSStreamSelector client udp.dns.domain client.ip.src
add ns limitIdentifier dropDNSRateIdentifier -timeslice 20000 -mode request_rate -selectorName dropDNSStreamSelector -maxBandwidth 1 -trapsintimeslice 20

add dns policy dnsDropOnClientRatePolicy "sys check_limit (\"dropDNSRateIdentifier\")" -drop yes
<!--NeedCopy-->

Limit the number of HTTP requests from the same host

Run the following commands to limit the number of HTTP requests that arrive from the same host with a subnet mask of 32 and have the same destination IP address:

add stream selector ipv6_sel CLIENT.IPv6.SRC.SUBNET(32) CLIENT.IPv6.DST HTTP.REQ.URL

add ns limitIdentifier ipv6_id -timeSlice 20000 -selectorName ipv6_sel

add lb vserver ipv6_vip HTTP 3ffe::209 80 -persistenceType NONE -cltTimeout 180

add responder action redirect_page redirect "\"http://redirectpage.com/\""

add responder policy ipv6_resp_pol "SYS.CHECK_LIMIT(\"ipv6_id\")" redirect_page

bind responder global ipv6_resp_pol 5 END -type DEFAULT
<!--NeedCopy-->

The official version of this content is in English. Some of the Cloud Software Group documentation content is machine translated for your convenience only. Cloud Software Group has no control over machine-translated content, which may contain errors, inaccuracies or unsuitable language. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, suitability, or correctness of any translations made from the English original into any other language, or that your Cloud Software Group product or service conforms to any machine translated content, and any warranty provided under the applicable end user license agreement or terms of service, or any other agreement with Cloud Software Group, that the product or service conforms with any documentation shall not apply to the extent that such documentation has been machine translated. Cloud Software Group will not be held responsible for any damage or issues that may arise from using machine-translated content.

Was this helpful

Examples of rate-based policies

September 10, 2024

Contributed by:

C C

September 10, 2024

Contributed by:

C C

Examples of rate-based policies

Limit the number of requests from a URL

Cache a response for the request URL

Drop a connection based on cookies

Drop a DNS packet from a particular IP address

Limit the number of HTTP requests from the same host

In this article