Examples of rate-based policies
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:
选择器添加流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 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 Drop a connection based on cookies
Run the following commands to drop a connection based on the cookies received in requests fromwww.mycompany.comif 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 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 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.subne (32)" CLIENT.IPv6.dst Q.URL add ns limitIdentifier ipvé_id -imeSlice 20000 -selectorName ipvé_sel add lb vserver ipv6é_vip HTTP 3ffe::209 80 -persistenceType NONE -cltTimeout 180 add responder action redirect_page redirect "\"http://redirectpage.com/\"" add responder policy ipvé_resp_pol "SYS.CHECK_LIMIT(\"ipv6_id\")" redirect_page bind responder global ipv6_resp_pol 5 END -type DEFAULT
Examples of rate-based policies
Copied!
Failed!