Use DNS to force youtube into restricted mode - and Pi-Hole

General
17

Thank you so much for your answer and how quickly you got back to me.
I just had one more question.

IMG_3395.PNG750×381 106 KB

What is the command to create a /etc/dnsmasq.d/05-restrict.conf? And add in the links.
I'm running it on the Raspberry Pi 3 running Dietpi.
Also I'm just curious, how long have you guys been at this stuff?
When I read people's discussions I'm shocked at how many geniuses are out there and how little I know. There are so many pi projects that are really cool.
So far my favorites are Retropie and Pi-hole

18

You can find a detailed basic installation manual here. This manual assumes raspbian jessie lite, version march 2017, but most things will be identical. Among other things, it explains how to setup putty and winscp, witch will allow you to create/edit files easier.

19

you might want to append the solution w/ duckduckgo settings?

= DUCKDUCKGO =
duckduck settings

something like
cname=www.duckduckgo.com,safe.duckduckgo.com and then, of coarse, update the host file w/ IP

= YAHOO =
Not sure if this helps or not; to my knowledge you need a proxy to append, is that true?

"Appending vm=r to a Yahoo search query URL also enables the strictest safe search settings."

20

Old thread, sorry. Would love to see this as a built-in feature that can be enabled/disabled within the UI. Just a thought...

1 Like
21

Hi,
I just set up pi-hole today so I'm still learning a lot. I'm trying to force Google and youtube to safe search. Attached is an image of my 05-restrict.conf file and my /etc/hosts file. I've also set up Bing safe search.

Bing safe search works. Google and Youtube do not block anything. Searching for 'Porn', 'Nude', etc bring up what you would expect from Google and Youtube while Bing tells me I"m under protected search.

For testing whether it's working I've flushed the cache of pi-hole and tried using Firefox and Chrome in incognito mode to make sure nothing was cached.

Any ideas why this configuration is not working for Google and Youtube?

image
image1636×484 347 KB

22

I made it with chmod +x ip.sh executable

But when I enter sudo bash ip.sh

It gives the following error:
sed: -e expression #1, char 41: unterminated `s' command

What does this mean?

23

I've never tested the script with duckduckgo, this was added later by @picante here. The script can't handle the output from dig, hence, the error message.

I've modified the script (I'm NOT a script guru, there might be a better way). Here is the summary of things you need to have, in order for this to work.

  1. Modify /etc/hosts, it should contain:
# restricted youtube, bing, google and duckduckgo search
216.239.38.120	restrict.youtube.com
216.239.38.119	restrictmoderate.youtube.com
216.239.38.120	forcesafesearch.google.com
204.79.197.220	strict.bing.com
46.51.179.90	safe.duckduckgo.com
  1. Create an aditional dnsmasq configuration file, for example /etc/dnsmasq.d/98-restrict.conf.
    Use any number you haven't used yet, apart from 01, 02 and 03 (see earlier for an explanation). This new file should contain the following:
# YouTube
# you can also implement a moderate setting
# replace restrict.youtube.com with restrictmoderate.youtube.com
cname=www.youtube.com,restrict.youtube.com
cname=m.youtube.com,restrict.youtube.com
cname=youtubei.googleapis.com,restrict.youtube.com
cname=youtube.googleapis.com,restrict.youtube.com
cname=www.youtube-nocookie.com,restrict.youtube.com

# SafeSearch
cname=www.google.com,forcesafesearch.google.com

# Bing Family Filter
cname=www.bing.com,strict.bing.com

# duckduckgo
cname=www.duckduckgo.com,safe.duckduckgo.com

You can test the new configuration file by running:

dnsmasq --test
  1. restart dnsmasq, if you're still using the current production version:
sudo service dnsmasq restart

if you're already using FTLDNS, restart FTLDNS (I'm not running FTLDNS, I found the restart command here):

sudo systemctl start pihole-FTL.service
  1. You might want to update the IP addresses, using a script, but I don't think this is necessary. I wrote the original guidelines over a year ago, the addresses have not changed. Here is the updated script:
#!/bin/bash

update_ip_address() {
file=/etc/hosts
if [[ $(grep $1 $file) ]]; then
	IP=$(nslookup -query=A $1 8.8.8.8 | grep 'Address:' | tail -1 | \
		grep -oE '((1?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.){3}((1?[0-9]?[0-9]|2[0-4][0-9]|25[0-5]))')
	sed -i "/$1/ s/.*/$IP\t$1/g" $file
fi
}

update_ip_address restrict.youtube.com
update_ip_address restrictmoderate.youtube.com
update_ip_address strict.bing.com
update_ip_address forcesafesearch.google.com
update_ip_address safe.duckduckgo.com

Hope this helps...

@DL6ER: as suggested somewhere in this topic, this might be a nice feature to add to the web interface, so users can activate / deactivate safe search with a single click.

2 Likes
24

I didn't get duck to work. My post had a link to duck settings, which states you have to append to the URL to force safe searches, not sure if the approach discussed here can do that.

25

According to this, using safe.duckduckgo.com is a solution, among others.

I use edge, just typed 'nude' in the address bar, this is the result:

image
image1907×802 39.2 KB

I have no idea how to remove the possibility to turn off the option to disable the safe search. Anybody?

26

any step by step tuto or full install script by any chance ?

1 Like
28

Unfortunately, this doesn't help. pihole handles DNS entries and isn't capable of adding/modifying stuff to URL's, at least not that I know of.

The idea is to provide safe search without any local user interaction, local installation on the target machine(s), or possibility to tamper with the result.

30

Hey folks, I have made a script to make this much easier!
https://raw.githubusercontent.com/jaykepeters/Scripts/Deployment/Pi-hole_SafeSearch.sh

4 Likes
32

Thanks for the feedback, @anon55913113! I will work to implement this into the next version within an hour or so. I am not 100% sure if DuckDuckGo can be forced into SafeSearch all the time, but for now we will just add it to the CNAME's in "/etc/dnsmasq.d/05-restrict.conf" and safe.duckduckgo.com will be added to the hosts file, per your request. You are more than welcome to collaborate with me on this on GitHub as well.

33

I think your idea works!
And when I try to turn safesearch off, it stays on! DuckDuckGo must have recently added this functionality as it did not work earlier this year (May/June)

image
image965×637 55.6 KB

35

You will never see it using forcesafesearch.google.com or safe.duckduckgo.com in the web browser, DNS does that behind the scenes. That is because it is a CNAME record. I may have mislead you, I attempted to to it in May/June but it did not work. Now it does work. This has been an open feature request with duckduckgo for some time now.

As you can see below, it is working for me:
image

How do the last lines of /etc/dnsmasq.d/05-restrict.conf and /etc/hosts look?

I have tried this with two pi-holes and I can confirm it is working. Is your devices' DNS cache cleared and is it using Pi-hole as it's ONLY dns server? This would cause conflict.

Try my main Public Pi-hole at 35.188.83.81, and only use 35.239.60.156 if that does not respond.... They should have Safesearch enabled...

38

Thanks for checking it out! I will work on that tomorrow... So can you really eliminate the hosts entries now? How about google since there are 300+ domains...

40

And where would this be added?

42

Use this: http://35.188.83.81/UniPi.php?q=ss
Do you see how google has 300+ top level domains. Each of them needs a CNAME DNS record to enforce SafeSearch. The question I was asking was: Would I just need 1 host record for Google SafeSearch forcesafesearch.google.com so I don't have to put it in the hosts file? I don't understand what your regex is for either. Is it to block other websites that may expose adult content?

45

Ok, I see. You have IPV4 and IPv6 records. Could I put multiple IPV4 addresses to point to a host and dnsmasq would do it round robin? Or should I radnomly select an IP?

Happy New Year!

47

I am working on making a python command line tool to acomplish this very task. This is turning into more of a project and I don't think bash will do the trick anymore. I will have it done by the end of the week.

1 Like