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DNS... set your system up to use an external DNS provider like OpenDNS where you can select categories to block.
I used this to block adult, gambling, malware, etc at the grandparent's house when the kids were growing up and starting to search the internet for school homework, etc.
If it's done in the router you'll cover all devices and you give someone else the password, so you can't change it.
Any of the adblockers can do this. Pihole, adguard home, technitium. Ublock origin to. You can probably do it pretty painstakingly through the hosts file as well.
NextDNS is a good option for your use case. It allows you to block entire categories of websites and even has an option to setup a schedule on when you are allowed to access them. It also has blocklists you can pick from and the ability to blacklist and whitelist individual domains. And the free plan is very generous. You can just try it and see how it works for you.
Roughly from high level to low level:
Best apply the methods arbitrarily, so that you get even more confused about how you might restore access to a given website.
Options 5 and 6 may be the only viable ones for locking down certain smartphones or tablets.
Setup a PiHole and add them to the blocklist. Then make the PiHole password stupid long and write it down. Then take the paper, put it in a safe, and put it in the highest shelf in the back of your closet. Recurse safes and passwords as much as needed.
You’re gonna have better luck changing your habits than you will making a block that you yourself can’t overcome.
Creating hurdles can help lowering the temptation. I totally get OP.
Therapy of some sorts is probably going to be more effective than making self-blocks, especially if you're technically competent. I wish you luck with stopping whatever addiction it is.
Therapy is probably a better option.
Only thing I can think of is to remove your default account from the sudoers file and have an account with a frustratingly long password written on physical paper hold the keys to the kingdom. That will make a whole lot of other things a hurdle too though.
Yeah, whatever roadblocks are set up can easily be dismantled using the same privs.
Only way to achieve this goal is to either hand the keys to someone else or to lock yourself out.
Can you use another device? Write a script that accesses your computer though ssh, check the hosts file and run rm -rf or something when it isn't there
If redirecting with /etc/hosts isn't enough, you could set up a cron job (I guess as root?) to re-copy a hosts file back to /etc/hosts every half hour or something. That way even if you do manually change /etc/hosts for an quick peak of an illicit website, it'll go back to being blocked in a short amount of time. This'll add a bit of the "pain in the ass" factor.
Just set the site to be hidden? If it's not in the list you didn't even know its an option and thus everything else is moot.
Pretty sure every search engine at thing point has a option to just "not show results from this website" or equivalent.
Out of sight out of mind.
i'm curious what websites are you doing. what's the threat model??
lol it's probably porn