allow traffic to VS based on the source IP fwded in the http get request

Hello sandiksk,

try this irule.

when HTTP_REQUEST {
     Traffic is allowed. Client IP match found in datagroup_QA
    if { [class match [[HTTP::header Client-IP]] eq "datagroup_QA" ] }{
        pool your_web_application_pool
    }
    else {
     Traffic is dropped. Client IP match not found in datagroup_QA
    reject
    }
}

Or you can answer with a HTTP response using HTTP::respond. For example 403 Forbidden. To do so, replace reject with 'HTTP::respond 403' without quotes. Be aware of faked HTTP headers.