Forum Discussion

vaibhav_salunk2

Nimbostratus

Apr 08, 2020

Solved

x-content-type-options

Hi,

I want to insert X-Content-Type-Options value as nosniff in http header using i-rule and below is my syntax.

when HTTP_RESPONSE {

if { [HTTP::header exists "X-Content-Type-Options"]} {

HTTP::header insert "X-Content-Type-Options" "nosniff"

}

Please confirm if it is correct or not

Hello,

Here is the correct syntax

when HTTP_RESPONSE_RELEASE { 
if {!([HTTP::header exists "X-Content-Type-Options"])} {
        HTTP::header insert "X-Content-Type-Options" "nosniff"
    }
}

REF - https://support.f5.com/csp/article/K04436209

3 Replies

Lidev

Nacreous

Apr 08, 2020

Hello,

Here is the correct syntax

when HTTP_RESPONSE_RELEASE { 
if {!([HTTP::header exists "X-Content-Type-Options"])} {
        HTTP::header insert "X-Content-Type-Options" "nosniff"
    }
}

REF - https://support.f5.com/csp/article/K04436209

vaibhav_salunk2
Nimbostratus
Apr 09, 2020
Hi Lidev,

Thanks for quick reply, i am new to i-rule syntax, just wanted to understand use ! in syntax.
Lidev
Nacreous
Apr 09, 2020
You're welcome.

if you want to go deeper, read this great documentation to know everything about iRules 😉
https://devcentral.f5.com/s/articles/irules-101-01-introduction-to-irules

If my answer was helpful, don't forget to mark the answer as "the best".