dns content filter UsgFlex500 domain environment

Hi @MassimoRiva

To help troubleshoot the issue with your DNS Content Filter on the USG FLEX 500, please check the following:

1. Configuration: Ensure the DNS Content Filter is properly configured. You can refer to this detailed guide:
   • https://community.zyxel.com/en/discussion/27566/how-to-configure-dns-content-filter-on-premises
2. Logging: Verify that logging is enabled for the DNS Content Filter. This will help track and analyze any filtered traffic.

If everything appears to be set up correctly, could you provide more details about the traffic that you expect to be detected but isn't? This will help us better understand the issue.

Additionally, you may find this article helpful for further troubleshooting:

• How to Check Content Filter Service When It Is Not Working as Expected — Zyxel Community