Last verified: September 25, 2026.

SSTP (Secure Socket Tunneling Protocol) helps on restrictive networks that block OpenVPN/L2TP, since the tunnel rides over TCP port 443, indistinguishable from regular HTTPS traffic.

Values

Field	Value
Server	Romania 1: buc-1.rotunneling.net Romania 2: buc-2.rotunneling.net
VPN type	SSTP (Secure Socket Tunneling Protocol)
Username / Password	Your RoTunneling account

Steps

1. Settings > Network & internet > VPN > Add VPN.
2. VPN provider: Windows (built-in).
3. Server name or address: pick a host.
4. VPN type: Automatic, or Secure Socket Tunneling Protocol (SSTP) if listed explicitly.
5. Type of sign-in info: User name and password, enter your account.
6. Connect.

Troubleshooting

• Error 0x800704C9 / untrusted certificate: SSTP needs a valid certificate chain on the server; if your browser warns about the server's certificate, contact the RoTunneling support team.
• If SSTP isn't listed explicitly under "VPN type", choose Automatic — Windows negotiates SSTP automatically when other protocols are blocked.
• Source: Microsoft documentation on built-in Windows VPN connection types, checked 2026-09-25.

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Tags: sstp windows, vpn port 443, rotunneling