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StephenGonsalv1's avatar
StephenGonsalv1
Icon for Nimbostratus rankNimbostratus
Sep 12, 2017

I rule creation for http headers using Data groups

Hi All

Need your help to create an irule to permit the following http headers and drop all(x-) others. Need to work this through by creating a data group for the below headers so that we don't have to disturb the i rule every time. Your speedy response would be appreciated. X-XSS-Protection X-Content-Type-Options x-frame-options

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when HTTP_RESPONSE { Remove all instances of the Server header HTTP::header remove Server

Remove all headers starting with x- (i.e. X-Powered-By, X-AspNet-Version, X-AspNetMvc-Version)

foreach header_name [HTTP::header names] {

if {[string match -nocase x-* $header_name]}{ 
     This header needs to be allowed to mitigate clickjacking  
    if {[string match -nocase x-frame-options $header_name]}{   
        continue;
    }

     HTTP::header remove $header_name 
  }

} }

application delivery
devops
iRules

1 Reply

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  • VernonWells's avatar
    VernonWells
    Icon for Employee rankEmployee
    Oct 09, 2017

    Not tested, but this should be close.

    when HTTP_REQUEST {
    foreach hn [HTTP::header names] {
        if { $hn starts_with "x-" or $hn starts_with "X-" } {
            if { ![class match $hn equals my-data-group] } {
                HTTP::header remove $hn
            }
        }
    }
}