Hello @bit_byte Please see above in this thread for the detailed answer. You will see FW management port sending such query because one of the following reason: 1. FQDN Address Objects: When IoC domains are configured to use in the Destination Address in Security Policies. 2. IP addresses in pre-defined threat report where reporting engine picking up blocked websites or blocked domains to populate IP addresses. In the above two cases firewall to attempt DNS resolution on the FQDN Address Object, and populate an IP Address for Security Policy match. If you want to make a black-list, please use spyware profile or EDLs. The custom Domain EDLs can have a list of your custom domains. 3. DNS security is enabled. 4. DNS proxy is enabled Best Himani
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