Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

chris_p_clark_1's avatar
chris_p_clark_1
Icon for Nimbostratus rankNimbostratus
Apr 13, 2017

Set HTTP::header when ASM_REQUEST_DONE

I want to set a header within the ASM_REQUEST_DONE event. I have the logic to do what I need but it does not set the header. There are examples on this site of people doing it but it does not work fo...
ASM Advanced WAF
devops
irules
security
cjunior's avatar
cjunior
Icon for Nacreous rankNacreous
Apr 17, 2017

Hi, you could try something like this: 

when ASM_REQUEST_DONE {
    if { [ASM::status] ne "clear" } {
        foreach {viol} [ASM::violation names] {
          log local0. "Violation is $viol"
          if {$viol eq "VIOLATION_HTTP_SANITY_CHECK_FAILED"} {
              log local0. "Yep, found VIOLATION_HTTP"
                set violation_http_found 1
            } 
        }
    }
}
when HTTP_RESPONSE_RELEASE {
    if { [info exists violation_http_found] } {
        HTTP::header insert WAF VIOLATION_HTTP
        unset violation_http_found
    }
}

Regards.