How to restrict access to the site by type of traffic?

Question

Traffic analysis

It is necessary to restrict access to the site by traffic type Organic, Direct, Referral, Email.

Example:

- a user who got to the site through search engines (Organic traffic) should receive a 200 server response
- a user who got to the site by direct access or followed a link or came from an email should receive a 403 or 404 response.

How can I adjust server responses for traffic types?

Answer 1

Look in the "referer" heading.

Answer 2

parse the header received from the user ( https://ru.wikipedia.org/wiki/HTTP_referer)
Read about https://ru.wikipedia.org/wiki/UTM-%D0%BC%D0%B5%D1%...
But there is no 100% reliability here.