Secure Link for Nginx is a shortcode plugin for WordPress to embed hash code for link that want to be protected. Protectition based on client IP and user agent. This plugin must be use when nginx web server already configured with secure link module
Using shortcode
Shortcode can be use with parameter or without it. Suppose you want to protect
img.png file under /secure folder, using with parameter:
<img class="" src="/secure/img.png[sln_create slfile='/secure/img.png']" />
using it whitout parameter:
<img class="" src="[sln_create]/secure/img.png[/sln_create]" />