Ubuntu and Associated Distributions/Parental controls Linus Mint

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Question
Hi John
Not sure this is a John question, if not perhaps you can point me.
Trying to find parental controls/software to configure on my 15 y/o grandson's laptop: Linux Mint Rosa/Cinnamon 17.3. I know nothing about Linux, but after 2-3 hours of reading about Linux I'm now a little more knowledgeable. My daughter just wants to block porn sites, NOT trying to control the amount of time he spends online.

I've been googling but can't find anything that appears suitable.
OpenDNS Family Shield, it says his laptop is protected but I can still pull up porn sites.

MintNanny you have to enter every domain manually.

DansGuardian comments say it can be difficult to setup.

WebContentControl reads that it helps you setup other programs.

I'm average computer-savvy but ideally like to find something easy to setup and forget, but am open to some configuration if I have instructions.

Thanks so much, John
Don

Answer
I don't know of a way to do what you ask.  For one thing, anything that can be done can be undone regardless of the Operating System.  School Districts filter at their Routers/Gateways.  As it happens, this is the only way I know how to do it.

Every home and small business )SOHO) router I've ever accessed runs something built around the Linux kernel.  FreeBSD for example.  Most SOHO routers/gateways run busybox which is a trimmed-down version of Gnu/Linux.  I usually refer to Cisco as an example, which runs proprietary software.

To put these thoughts together, the router needs to be in a locked room and it needs to be configured so that you can block sites you don't want to allow access to.  Since the routers can be reset by anyone with physical access, the router needs to be someone that's physically secured, so it's protected from "unauthorized" access.

The answer to this question is independent of the Operating System. It's applicable to Windows, Apple, Smartphones, pad computers, tablets, etc.

Hope this is helpful.

(Also: "Linus" is the first name of Linus Torvalds the creator of Linux.  He owns the trademark and determines licensing.  He created Linux (along with contributions from other programmers) specifically to contribute a kernel that runs common Unix tools.  It is Free Open Source Software but it's only a kernel.  It runs in hundreds of Operating Systems but most can be traced to a pre-existing "Distribution".  Examples of those that are at the top of the tree include Debian, Red Hat products, Ubuntu, Windows repair disks, and tools used for Penetration Testing and as Forensic tools.  Microsoft also has a version of these days but they charge for it, in a manner compliant with the licensing terms chosen by Linus Torvalds.)  

Ubuntu and Associated Distributions

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John Crout

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The command line, configuration files, recompiling the kernel, maintaining a system, hardening a system, package managers, browsers. Questions about Debian, Ubuntu, KUbuntu, MINT, Knoppix, CentOS, Red Hat Enterprise, Linux Wifi, embedded Linux, Live CD, forensics tools, vulnerability and pen testing tools, virtual installations.

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LiveCDs, Debian, Red Hat, CentOS, Running on VMware, MINT, Ubuntu Studio, NIST Working Groups,

Organizations
Association for Computing Machinery Information Systems Security Association (ISSA), United States Coast Guard Auxiliary, ISC2, ACM

Publications
RTCA/DO-178B, "Software Considerations in Airborne Systems and Equipment Certification", (member of SC-167), RTCA/DO-160C, "Environmental Conditions and Test Procedures for Airborne Equipment", (member of SC-135) Student Doctor Magazine EE Times Network World blog Navy CIO blog Medforum CGAUX groups and CGAUX National Staff groups Analytic Bridge LinkedIn

Education/Credentials
Master of Public Health (Epidemiology and Biostatistics) Bachelor of Science in Electrical Engineering (Computer Engineering Option) Digital Forensics Basics, Texas Engineering Extension Secure Software, Texas Engineering Extension Network Security, Texas Engineering Extension Infosec Basics, Texas Engineering Extension Information Assurance Awareness, Department of Defense Information Systems Security, United States Coast Guard Online safety for parents and children, Fort Collins Police Department Spear Phishing, Defense Information Security Agency, DISA Spear Phishing, United States Coast Guard, USCG Meeting the Media, Testifying, Presentations, Arch Lustberg FEMA (ICS-100, -200, -210, -700, 800) United States Coast Guard Defense Information Systems Agency United States Coast Guard Auxiliary Crosby Quality Workgroup Facilitator Trainer Crosby Quality Education System Wisconsin University, ISSA training workshops

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