Transform Rules Error: 'set' is not a valid value for operation because it cannot be used on header 'server'

General Rules
1

I need to change the server header value for my Cloudflare site.

I am doing this because the website controlled by Cloudflare is used to test against a website scanning tool. That scanning tool will try to detect if a server signature is exposed.

Currently the server header has a value of cloudflare but to test this tool I need it to have a value of something like nginx/1.10.1 (Ubuntu).

But when I try to change it I get this error message:

‘set’ is not a valid value for operation because it cannot be used on header ‘server’.

Is this error message saying that Cloudflare does not allow changing of the server header?

And if so, is there anyway I can get an exemption for this? Because it seems like a strange restriction that will hamper my use case.

2

Yes, it means you cant modify the header with the name ‘server’. No, there are exceptions/exemptions, sorry.