You can disable the Trellix GTI FQDN server from the command-line.
Log on to the system as a user with administrator rights.
Navigate to the default or custom directory. For example:
cd /opt/McAfee/ens/tp/binRun the command.
./mfetpcli ---setipv6gtistatus disableto disable IPv6 on Trellix GTI FQDN server.