Five technologies at a glance
VPN Proto supports five connection technologies in one Android interface. They are not interchangeable file formats, and V2Ray is a proxy platform with multiple protocols rather than a direct equivalent of one VPN protocol.
| Protocol | What you bring | Works with | Setup |
|---|---|---|---|
 OpenVPN | .ovpn configuration | Existing provider & workplace profiles | OpenVPN guide |
 WireGuard | .conf configuration | Your own WireGuard server or provider | WireGuard guide |
| SSTP | Server + username + password | SSTP servers with a trusted TLS certificate | SSTP guide |
| IKEv2 | Server credentials · Android 11+ | Compatible IKEv2/IPsec server accounts | IKEv2 guide |
 V2Ray | Share link or configuration text | Compatible V2Ray / Xray configurations | V2Ray guide |
Choose in this order
- Check your server. Ask which protocols it supports and request a client configuration for your device. A WireGuard server does not become an OpenVPN server when you change a dropdown.
- Check your Android version. VPN Proto runs on Android 7.0 or later. Its IKEv2 implementation requires Android 11 or later.
- Match the supplied settings. Import an .ovpn file for OpenVPN, a WireGuard .conf, a compatible V2Ray share link, or server credentials for SSTP or IKEv2.
- Test your actual network. Server distance, congestion, routing and network restrictions affect performance. A protocol label alone does not predict your speed.
What is different in practice?
OpenVPN: a configuration-led connection
OpenVPN profiles can describe TCP or UDP transports and different certificate or account requirements. It is a practical choice when your provider already supplies a working .ovpn file. Use a self-contained profile with the certificates it needs.
WireGuard: keys, peers and routes
WireGuard identifies peers with public keys and uses UDP. Its compact configuration includes an endpoint and AllowedIPs routes. The server must know your device’s public key. A local interface can start before the server responds, which is why checking traffic matters.
SSTP: a TLS connection to an SSTP listener
SSTP transports PPP over TLS. Use the exact hostname and TCP port your administrator supplies, and keep certificate verification enabled. A port accepting normal HTTPS traffic does not necessarily accept SSTP connections.
IKEv2: Android’s IPsec connection
VPN Proto uses Android’s platform implementation with server credentials and optional CA trust. This integration needs Android 11+. Server authentication requirements must match the manual profile flow.
V2Ray: configuration-dependent flexibility
V2Ray configurations can describe different protocols and transports. VPN Proto imports supported share links and configuration text. Compatibility depends on the details of the profile and bundled core; advanced features from another client may not transfer.
What does Connected tell you?
VPN Proto waits for an internet reachability check before showing Connected. It does not perform a complete DNS, IPv6 or route-leak audit. A split-tunnel profile can intentionally send some traffic outside the VPN. The server operator’s privacy practices also remain separate from the app.
There is no single fastest or best protocol for every connection. Test the options your server supports, using the same phone, destination and network. Save working profiles and disconnect before switching.