--- /dev/null
+== Restrict login redirect ==
+
+As a security best-practice, Evergreen should not allow arbitrary
+redirection on successful login, but instead limit redirection to
+local links or configured domains and schemes.
+
+This feature is controlled by a new global flag called *opac.login_redirect_domains*
+which must contain a comma-separated list of domains. All hostnames
+under each domain is allowed for redirect, and the scheme of the
+redirect URL must be one of http, https, ftp, or ftps.
+