Can one redirect a request depending on where the request is coming from, e.g. based on the referer header?
We like to redirect all requests from a certain url to a special page.
Not in our normal redirects functionality.
You may be able to use something like a function: Functions overview | Netlify Docs to either execute some logic and render content conditionally (“for referrers that contain //google.com/, show landing page text ; otherwise show login box”), or to “gate” access based on some logic (e.g. return a javascript client-side redirect back to landing page unless referrer is already from a specific domain)
More literally, yes, you can redirect based on geographic location, but I am pretty sure that is not what you meant: Redirect options | Netlify Docs