URLs for servers that host images, media files, or JavaScript for one or more sites and are intended to speed up content retrieval for existing web servers, such as Apache. Content servers generally do not have content posted or through-site navigation for web surfers. Content servers hosting images do not allow users to browse the photographs. This category includes domain-level and sub-domain-level URLs that function as content servers.
This category does not include: • Web pages for businesses that provide the content servers • Web pages that allow users to browse photographs. See the Media Sharing category. • URLs for servers that serve only advertisements. See the Web Ads category.
Category combinations This category can be used with the Media Downloads and Streaming Media categories to cover sites that have bandwidth risks.
Please provide context for those messages, or is that the same message? "Categorization failed" usually means there's difficulty reaching the categorization server. What version of Astaro are you using?
Cheers - Bob
Sophos UTM Community Moderator Sophos Certified Architect - UTM Sophos Certified Engineer - XG Gold Solution Partner since 2005