The IP safelist for Web Reputation Service (WRS) and URL Filtering does not work when using a proxy server.
This happens because IP safelist only applies to direct traffic without proxy. Therefore, if you are using a proxy server, the network traffic will not be bypassed since it is using a proxy IP address.
Trend Micro recommends that you only use the allow list for internal network IP addresses that do not use a proxy server to ensure proper safelisting of specific addresses.