Skip to content

School Network Restrictions

Website Permissions

Individuals that use the U.S. Cyber Range may potentially find that our website is blocked by their school's network restrictions. In order to prevent this, we ask that our domains be added to the allowlist of any schools that wish to use the Cyber Range.

Please contact your institution's administration or IT representatives and request to add the following domains to the network allowlist:

1. *

2. *

3. *


The most common method for students to join their course is by an email invitation from their instructor. Time-based automated emails regarding course expiration and billing are also sent.

These and any other automated emails will be sent from the following domain and will be DKIM signed and have a DMARC policy set:


While either troubleshooting with our Support Team or corresponding with U.S. Cyber Range Services, you may also receive emails from the following domains:



Have a Question? Contact Support


Students: Please reach out to your Instructor who can submit a ticket to our Support Team on your behalf.

We're here to help you. If you still have questions after reviewing the information above, please feel free to submit a ticket with our Support Team and we'll get back to you as soon as possible.