Opto 22 strongly recommends using HTTPS for secure, encrypted access to your controller. Use HTTP for testing purposes only.

Computer Prerequisites

To configure a PAC to use HTTPS, the following programs and packages should be installed on your computer:

  • OpenSSL command-line tools
  • PAC Project 9.5 or later


Beyond the above prerequisites, the following steps must be taken.

  1. Generate SSL certificates
  2. Configure the controller

Each of these steps is described in the following sections.

Next Step

Continue on to generating SSL certificates.