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Net-Blocker: Simple Internet filter and monitor
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MAC Address Filtering: What It Is and How It Works
What is “filtering” or “blocking” software? When should it be used in schools? Are there times not to use it? - Education Technology Center - UIowa Wiki
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Packet Filtering (Building Internet Firewalls, 2nd Edition)
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This hardware privacy filter works on all devices and is on sale this Mother's Day with code
4 Ways to Bypass a Firewall or Internet Filter - wikiHow