Tell me about the secureHeaders@file middleware

Traefik Traefik v2
1

I've seen secureHeaders@file used in many, many places. Where I don't see anything about it is in traefik's docs, this forum, or in a google search for the phrase.

So, what gives? Is it actually the headers middleware, only renamed? If so, why is there nothing about that change? One of those examples is as recent as Jan 2023, 10 months ago.

2

It’s the name of a middleware configuration, that is usually assigned to a router and usually specifies CORS headers.

It’s for example defined here under "dynamic.yml".