ultimately , it is your choice.
as said above my fellow, that do 1 minute at a time if you need to.
this is battle of mind and concentration.
if you put filter, still you would go back , you have so many other ways to reach porn , you can reinstall the windows etc etc.
so instead of running from porn , just take back control of your mind.
find with triggers and fantasy.
last battle will be with fantasy and triggers.
if you get any trigger , avoid it as soon as possible , dismiss the trigger , if you are watching a girl , and going into fantasy , stop looking at that girl. lower your gaze.
if you are going into fantasy , stop the fantasy instantly.
this is the way , you can reboot.
for rebooting you have to take back the control of your brain.