FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
hazim
Staff
Staff
Article Id 248526
Description This article describes the DNS traffic will not show in the debug if using a set source interface and HA-direct enabled.
Scope FortiGate version 6.4, 7.0, and 7.2 above.
Solution

When turning on HA-direct in the HA configuration and using the set source interface for DNS configuration, DNS traffic will not be visible in the debug going out to the configured port:

 

hazim_0-1678325870154.png

 

When querying the DNS and debug sniffer will not show any traffic:

 

hazim_0-1678325870154.png

 

To solve this issue, it is necessary to remove the set source interface if enabling the HA-Direct configuration in the FortiGate. Then the DNS traffic will be sent out to the expected port and able to see in the debug sniffer.