Question

There is a way to know and check “who make”/”where come from” a NET/HTTP request?

P.S.: I am using Ruby on Rails.

Answer 1

You a probably looking for request.remote_ip in your controller.

You can find it in the Ruby on Rails api documentation, specifically:

Determines originating IP address.
REMOTE_ADDR is the standard but will
fail if the user is behind a proxy.
HTTP_CLIENT_IP and/or
HTTP_X_FORWARDED_FOR are set by
proxies so check for these if
REMOTE_ADDR is a proxy.
HTTP_X_FORWARDED_FOR may be a comma-
delimited list in the case of multiple
chained proxies; the last address
which is not trusted is the
originating IP.