HiHi,

It would greatly assist the investigation if you could provide more detail as setting & screenshots.

Ans 1. Specific settings in the Sangfor device to check for this issue include ensuring that the VPN profile is correctly configured with the appropriate authentication and encryption settings, checking for any IP address conflicts, and confirming that the VPN service is running and accessible.

Ans 2. Compatibility issues with network configurations can arise due to mismatched IP ranges, subnet masks, or conflicting routing rules. Ensure that the Sangfor device settings align with the network environment, and consider adjusting configuration parameters if needed.

Ans 3. Advanced troubleshooting steps could involve capturing network traffic to analyze communication between the client and the Sangfor device, checking VPN logs for detailed error messages, testing the connection from a different network to isolate potential issues

1. Check the Configuration: Ensure the shared key and user credentials match on both ends of the VPN connection. If you’re using an IPSec VPN, make sure you’ve followed all the configuration steps correctly.

2. Check the Network Connection: Make sure your internet connection is working properly. If necessary, disconnect and reconnect your internet connection.

3. Check the Public IP Addresses: Ensure the public IP addresses for both ends of the VPN connection are correct and accessible from the internet.

4. Check the Logs: Look for any error messages or warnings related to the VPN connection in the logs.
Update Your Device: If you’re using Sangfor’s SSL VPN, make sure your device is updated with the latest patches. Sangfor has released a repair patch for SSL VPN products to address recently discovered vulnerabilities.