Operators may have a list of hostnames for which they do not want to perform any web-service URL classification (or ICAP-based URL filtering). Sites may include the operator's portals or portals which the operator trusts as safe.
Similar to the deny-lists, the globally allowed sites are included in a file and in a local filtering url-filter. If a subscriber's HTTP request is included in the allow-list, then access to the site is allowed. The system does not check any additional URL filters (if configured).