irule to limit parameter and it's values on certain URL

Hi,

You can insert an irule within HTTP or ASM events to make sure that your requirement is respected :

when HTTP_REQUEST {
    if { [HTTP::path] eq "/x/y/z" } {
        set param1 [URI::query [HTTP::uri] param1]
        set param_array [split [regsub -all {&=|&$} [URI::decode [URI::query [HTTP::uri]]] {}] "&"]
        set param_count [llength $param_array]
        if { !(($param1 eq "value1" or $param1 eq "value2") and ($param_count == 1)) } {
             drop, reject, generate ASM violation, ...
        }
    } 
}

Regards

Yann