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.
If the error (code: 0001-0001) appears after the pre-upgrade check, go to Network > Sangfor/IPsec VPN > Sangfor VPN > Basic Settings to check whether local subnets starting with 127 exist.
If these subnets exist, delete them and reinstall the pre-upgrade check package. (Deleting the subnets will block device access to them. Please operate with caution.)