Prolific uses systems to detect anonymizing tools like VPNs, proxies, and private relays, since they can pose security risks. Sometimes a network, browser, or device setting can flag your connection this way even when you're not using one. Here's why it happens and how to fix it.
Why does this happen?
Your network, like workplace, university, or public Wi-Fi, may run a default VPN or proxy, and some mobile data or ISP setups use similar routing
Private relay features, such as iCloud Private Relay on Apple devices, anonymize your web traffic
Browser extensions, such as ad blockers or VPN add-ons
Incorrect device settings, like the wrong time, date, or location
Cached browser data interfering with connection checks
How do I fix it?
If you’ve encountered a VPN/Proxy detection error, follow these step-by-step troubleshooting tips:
Switch to a Different Network:
Use a home network instead of public, university, or workplace Wi-Fi.
On mobile, consider switching to mobile data (e.g., 4G/5G)
Restart your mobile device or router to acquire a new IP address (note that this does not guarantee the issue will resolve as another flagged IP may be assigned).
Update and Verify Your Browser:
Ensure you’re using one of Prolific’s supported browsers: Chrome, Firefox, Safari, Opera, or Edge (desktop/mobile versions).
Temporarily switch to a different browser to see if the issue resolves.
Check and Disable Privacy Features:
Turn off any VPNs, proxies, or private relay tools, such as iCloud Private Relay.
Windows: Settings > Network & internet > VPN
macOS: System preferences > Network
Look for a VPN icon near your system clock
On Apple devices, also check whether iCloud Private Relay is on via Spotlight search
Disable browser-level VPNs or extensions routing traffic anonymously.
Check browser settings/extensions to disable such tools.
Clear Cached Data:
Clear your browser’s cache and cookies to remove outdated or incorrect data.
Reduce Interferences from Extensions:
Temporarily turn off or remove all browser extensions, particularly those that block pop-ups/ads or introduce privacy features.
Verify Device Settings:
Ensure your device’s date, time, and location settings are set correctly.
If discrepancies are found, update the settings and restart your device.
How can I prevent this in the future?
Use a personal home network for Prolific where possible
Avoid workplace or public Wi-Fi, which can carry VPN-like configurations
Keep your browser and device updated
Turn off private relay features or other anonymizing tools while using Prolific
Clear your browser's cache regularly and check which extensions are enabled