Can parental control be bypassed via a VPN

Short answer: if the filtering works only by domains or DNS, then yes — bypassed in a minute. Here are the four bypass channels and what has to be closed.

1. Browser VPN extensions

The most common route: a free extension installs without admin rights and immediately hides the traffic from domain filters. It can be closed off only by system-level browser policies: forbidding installation and force-disabling specific extensions.

2. VPN clients and virtual adapters

WireGuard, OpenVPN, IPsec, Shadowsocks and similar programs create a virtual TUN/TAP adapter and pull all traffic into the tunnel. It is reliably shut down by two things: blocking ports and protocols at the firewall level, and disabling the virtual adapters themselves.

3. Encrypted DNS (DoH and DoT)

Modern browsers can resolve addresses over HTTPS. Then the home DNS filter stops seeing the requests. The solution: close the known DoH servers and port 853, and forbid DoH via browser policies.

4. Switching the program itself off

The most trivial bypass: kill the process in Task Manager or delete the rules. Hence three requirements: the rules live in the system firewall, not in the app; a watchdog service restores them automatically; and lifting the mode requires the parent password.

Checklist of a reliable solution

• Filtering at the level of the system firewall, not only by domains.
• VPN protocols, proxies and Tor blocked.
• TUN/TAP adapters disabled.
• VPN extensions and DoH forbidden by policies in Chrome, Edge and Firefox.
• A watchdog service and a password for switching it off.

The aim of such protection is not a “war” with the child but a predictable environment for the lesson time. It is better to talk openly about the enabled mode.