pfSense

Even though dhcp6c is started with -d option the information it provides in the log leaves a lot to be desired.
It does not log any useful information that could help in troubleshooting local or remote server problems.
Thus user must resort to running traffic capture/analyzer or running dhcp6c manually with -D option, which forces dhcp6c to output the config file that it is using, all communication with the server and actions that it performs with the response it receives.
It would be great if it was possible to start dhcp6c with -D option via GUI.