Athena NGFW (Next-Generation Firewall)

Athena NGFW (previously known as Network Secure) provides comprehensive protection for every network perimeter, ensuring the safety of your valuable assets, data, and users from emerging threats.
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Athena NGFW (Next-Generation Firewall) {{ breadTitle }} User Manual Network Sangfor/IPSec VPN SD-WAN Configuration SOFAST Optimization
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SOFAST Optimization

{{ $t('productDocDetail.updateTime') }}: 2026-02-05

SOFAST automatically identifies applications based on the Deep Packet Inspection (DPI) database and classifies them into interactive, realtime, and bandwidth-intensive categories. It intelligently detects link quality and matches link optimization models to ensure continuous business access in case of high packet loss.

Check Enable SOFAST optimization and select Adaptive or Custom for Mode, as shown in the following figure.

Adaptive: Enable SOFAST optimization based on the application packet loss rate predefined on the device.

Custom: Allow you to set a packet loss rate threshold for SOFAST optimization.

 

1. SOFAST optimization is available only when the transmission mode of Sangfor VPN is set to UDP, and takes effect only when it is enabled on both the HQ and branch devices.

2. You can enable SOFAST optimization on the HQ and branch devices in different modes.