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.
Not applicable
Article Id 194818
Description
The FortiGate unit does not resolve the IP address to host names for the traffic logs by default. To resolve the IP addresses to host names, you must set this in the CLI.
Note that more processing will be required to resolve host names and a valid DNS setting is needed.

To enable the name resolution of traffic log from the CLI :

config log trafficfilter
   set resolve enable
end