**DNS resolution not working when DNS Server configured to 'Same as Interface IP** **Products:** FortiGate v5.2 FortiGate v5.4 FortiGate v5.6 This article provides a solution to DNS resolution not working when DNS Server is configured to "Same as Interface IP". {{:fortinet:configuration:tn_fd40580-1.jpg?400|}} DNS resolution can be seen to fail {{:fortinet:configuration:tn_fd40580-2.jpg?400|}} **Solution:** **Enable the DNS Database Feature.** {{:fortinet:configuration:tn_fd40580-3.jpg?400|}} Configure a DNS Server for the interface that DNS requests will be sent to. Set the mode to "Forward to System DNS". {{:fortinet:configuration:tn_fd40580-4.jpg?400|}} DNS resolution can now be seen to be successful. {{:fortinet:configuration:tn_fd40580-5.jpg?400|}}