Fixing Firewall Issues
If SCORM courses fail to fully load, or show blank content, your firewall may be blocking Bigger Brains content.
Written by Bradley Riley
Updated at February 20th, 2026
Table of Contents
Occasionally Bigger Brains courses may be blocked or partially blocked by a network firewall.
Please Note:
The symptoms of a firewall issue may include:
- A blank screen where content should be showing (especially the video window).
- An error referencing an expired or invalid license when the customer's license is still valid.
- Videos displaying but not playing, or showing as blank content.
For Course Files Received In or After May 2024:
To resolve a firewall issue, ask your IT department to add this domain to your allow list (whitelist).
- tripletech.biz
Please Note:
IP addresses include:
- 192.232.237.143
- 20.118.48.7
- 52.85.151.83
For Course Files Received Prior to May 2024:
In 2024 Bigger Brains implemented a streamlined video hosting solution which only requires the tripletech.biz domain (and associated subdomains) to be allowed in order for our courses to function. Older courses still require you to ask your IT department to add these domains to your allow list (whitelist).
- tripletech.biz
- prod-nplayer.dacast.com
- dacastmmod-mmd-cust.lldns.net
- vzaarleg-mmd-cust.lldns.net
- dacast.com
- license.theoplayer.com
- vzaar.com
Please Note:
- The tripletech.biz domain is Bigger Brains' licensing server and general hosting platform.
- The various dacast and vzaar domains are our primary video hosting provider as of 2023.
- The lldns.net domains are a CDN used by Dacast.
- The theoplayer.com domain is for the video player software used by Dacast.