I have installed pfsense with NTOP and works fine, but I do not need always to NTOP and active when I need it.
I keep it almost always off because otherwise it uses too much RAM and CPU.
When i restart a pfsense or reboots due to a power outage NTOP start automatically.
There are a way to do disable NTOP at boot?
cd /usr/local/etc/rc.d/ touch ztop.sh chmod +x ztop.sh vi ztop.sh
put this line in the file:
save and reboot