This problem occurs when you have over 500 URLs in Apex One's Approved/Blocked URL List prior to Apex One SaaS hotfix 2209 or the December 2022 patch for Apex One On-Premise.
To address the issue, remove some URLs to ensure that the total URL count in both the approved and blocked lists does not exceed 500 URLs.
Note that both internal and external URL lists have a limit of 500 URLs each. The total URLs in the approved and blocked lists are counted within this 500 URL limit, as described below:
- WRS Approved list of External Agents + WRS Blocked list of External Agents <= 500
- WRS Approved list of Internal Agents + WRS Blocked list of Internal Agents <= 500
You can also use the wildcard character (*) anywhere on the URL to reduce the occurrence of redundant URLs/domains. Below are some examples:
- www.trendmicro.com/* means all pages on the Trend Micro website.
- *.trendmicro.com/* means all pages on any sub-domain of trendmicro.com.
Alternatively, you may block a URL/domain using User-Defined Suspicious Object (UDSO) List.
For further assistance, contact Trend Micro Technical Support.