x-content-type-options

[vaibhav_salunk2]

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

[Lidev · Accepted solution]

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]

Hi Lidev,

Thanks for quick reply, i am new to i-rule syntax, just wanted to understand use ! in syntax.

[Lidev]

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".