通過碘 dns 隧道連接並繞過網絡限制
PassTunnel enables you to bypass network restrictions in some regions and stay connected through a DNS tunnel. It is based on the open source Iodine project. This is not a normal VPN app. And it is slower than normal VPNs. Therefore, users that have unrestricted internet connections are advised to use other VPN apps for a better experience.