Hello

I am new to nginx. This is most likely a beginner question. I apologize in advance.

I have a client that is sending http request with an x-security-header: a6rb35723926d2c685c2d7ud3034179828blablabla

How can I configure nginx so that if the x-security-header is not present then the request is rejected?

Thank you very much for your help.

-matt