If your organization limits access to specific web entities, access to Expert sites can be granted by allowing IP addresses and domains. While Expert cannot provide IP addresses because they are subject to change without notice, the following domains are used by Expert as of January 14th, 2019:
a.mtstatic.com
files.mtstatic.com
cdn.mindtouch.us
ajax.mindtouch.com
fonts.googleapis.com
fonts.gstatic.com
d37gvrvc0wt4s1.cloudfront.net
<your Expert domain>
ldap.mindtouch.us
(only necessary if you are using LDAP authentication)