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Limit HTTP Request on LTM

ahmetnuman
Nimbostratus
Nimbostratus

Hello ,

 

I want to limit total number of HTTP request on our web application uri (like /test/test1). Is there any irule to accomplish this ?

 

Thank you very much

2 REPLIES 2

Hello.

 

You can use this approach replacing those global variables by table variables (for being CMP compatible).

https://devcentral.f5.com/s/articles/http-session-limit-1

https://clouddocs.f5.com/api/irules/table.html

 

The basic idea is to increase the counter value when HTTP_REQUEST is executed and decrease the same variable when HTTP_RESPONSE_RELEASE is executed.

 

Regards,

Dario.

Regards,
Dario.

ahmetnuman
Nimbostratus
Nimbostratus

Hello Dario thank you very much for reply,

 

I solved my problem via using following irule, it works very well, this i rule briefly count the coming http request on the vip ip if the uri's are /bla/blaservice or /bla/blaservices, then if maximum rate is reached within 2 sec, then bigip response http 2oo status code with blank pages.

 

when RULE_INIT { set static::maxRate 4000 set static::windowSecs 2 } when HTTP_REQUEST { if { [HTTP::uri] == "/blablaservice" or [HTTP::uri] == "/blablaservices/"} { # set variables set limiter [string tolower [HTTP::uri]] set vip_limitervar [IP::local_addr]:$limiter set get_count [table key -count -subtable $vip_limitervar] # main condition if { $get_count < $static::maxRate } { incr get_count 1 table set -subtable $vip_limitervar $get_count $vip_limitervar indefinite $static::windowSecs } else { #log local0. "$vip_limitervar has exceeded the number of requests allowed." HTTP::respond 200 content "" return } } }