He thong DPI (Deep Packet Inspection) ma nha mang Viet Nam trien khai co the phat hien giao thuc VPN trong vai giay. OpenVPN, WireGuard tieu chuan, L2TP/IPSec deu co dau hieu giao thuc dac trung ma DPI co the nhan dang va chan.
VLESS+Reality hoat dong khac. Giao thuc nay thiet lap mot ket noi TLS 1.3 thuc su voi mot trang web hop le (nhu cloudflare.com). He thong DPI chi thay mot ket noi HTTPS binh thuong. Chi co may chu cua ban moi co khoa bi mat bien ket noi nay thanh tunnel. Ket qua: viec chan la khong the thuc hien ma khong cat toan bo luu luong HTTPS.