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• TUN mode creates a virtual network adapter on your device, intercepting and forwarding all traffic at the network (IP) layer. This ensures that all apps and services — even those that don’t support proxy settings — are routed through the VPN.

• Advantage → Full system coverage for all traffic.
• Limitation → Because it works at the routing level, connections may be less stable under certain devices or network environments.

• By attaching your system’s HTTP proxy directly to the VPN service, System Proxy offers a more stable and consistent connection.
• Advantage → Smooth, reliable, and stable performance.
• Limitation → Because some apps and websites do not support proxy mode, they may still be blocked in certain situations.

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In 5UF VPN, Global mode and Partial mode describe how much of your traffic goes through the VPN.

Global mode:

• Most system traffic goes through the VPN.
• Good for users who want a more consistent VPN route.
• Also more suitable for apps that do not support proxy mode well.

Partial mode:

• Only selected websites, apps, or rule-based traffic goes through the VPN.
• Other traffic continues to use the local network directly.
• Useful when you only want specific traffic to use the VPN.

How should you choose?

• If you are not sure, Global mode is usually the simpler starting point.
• If you only want a small part of traffic to use the VPN, choose Partial mode.

The naming may vary slightly on different platforms, but the core idea is the same.

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