Compatibility with iOS:

OpenVPN (Open Virtual Private Network) is a widely used VPN service that supports various configurations, including "免_flow" or "no_flow" for streaming. However, the version of OpenVPN you're referring to might be outdated or not fully supported on iOS devices.

• OpenVPN 2. (21): This version is no longer supported on iOS. It was widely used but has been retired.
• OpenVPN 3. (213): It introduced "no_flow," which is similar to "免_flow." However, it may have compatibility issues with newer iOS versions.
• OpenVPN 4. (22): This version includes "no_flow" and is actively supported. It's better to use this version if you're looking for "no_flow."

Configuration:

If you want to use OpenVPN with "no_flow" on iOS, you can:

1. Use the Built-in VPN: Some iOS devices come with built-in VPN apps, such as OneClick VPN or VPNv2.
2. Third-Party Services: Use OpenVPN's official app or third-party services that support "no_flow."

Risks and cautions:

• Streaming Risks: If you're using "no_flow," ensure that your device's internet connection is stable and that you're not using parental controls or other services that restrict streaming.
• Privacy Concerns: Be cautious with your accounts and settings to avoid unauthorized access.

If you're looking for a more secure and trusted VPN service, OpenVPN is a good option, though ensure it's updated to a version that supports "no_flow" on your iOS device.