School networks are protected by firewalls and so whitelisting the following URLs is required in order for SNWeb to load successfully.

Login
https://login.simulationcurriculum.com
https://my.simulationcurriculum.com

Data
https://ssdata.starrynight.com
https://dataproxy.layeredearth.com/

Libraries
htps://code.jquery.com
https://www.google-analytics.com/analytics
https://apis.google.com

SkyGuide
https://skyguideweb-college.starrynight.com
https://skyguideweb-hs.starrynight.com
https://skyguideweb-ms.starrynight.com
https://skyguideweb-elementary.starrynight.com

Starry Night Desktop - What’s New
https://whatsnew.starrynight.com/

Starry Night Desktop - Remote SkyGuide
https://skyguide-desktop-elementary.starrynight.com/
https://skyguide-desktop-ms.starrynight.com/
https://skyguide-desktop-hs.starrynight.com/
https://skyguide-desktop-college.starrynight.com/

Web-Based Applications (SN and TLE)
simcur-tools-provider.herokuapp.com
my.simulationcurriculum.com.herokudns.com
simcur-tools-consumer.herokuapp.com
login.simcur.com.herokudns.com
login.simulationcurriculum.com.herokudns.com
my.simulationcurriculum.com
login.simcur.com (also listed in Login above)
login.simulationcurriculum.com (also listed in Login above)