If a list of allowed websites is not implemented, a list of allowed website categories is implemented instead.
Topic
Allowing access to specific websites
Applicable to
Non Classified, Official, Protected, Secret, Top Secret
History
Priority
should
Mar 2022
Removed
The recommendation to implement a list of website categories for web content filters (ISM-1170) was merged into the recommendation to implement a list of organisation-approved domain names (ISM-0958) as an alternative approach.
2015
If agencies do not whitelist websites they should implement categories for all websites andblock prohibited categories and uncategorised sites.