Open Device Manager:
1. Open Computer Management
2. Uninstall ‘WAN miniport (IP)’
3. Scan for Hardware changes
4. Restart Draytek Client
5. Try connecting to VPN again
Nguồn: https://www.hieupc.com/2020/12/fixed-draytek-smart-vpn-no-ppp-control.html
Fixed Draytek Smart VPN no ppp control protocols configured
