3.8.3.1 Secure Tunnel Encapsulation Listener

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The server MUST open a listener socket on the Secure Tunnel port. The Secure Tunnel connection port SHOULD be the well-known SSL port 443/TCP.

The SSL protocol handshake is not used on this port. This listener communicates using the SSTP protocol.

The Secure Tunnel listener supports both Secure Tunnel Proxy connections and direct client to server connections. From the perspective of the Secure Tunnel listener, there is no difference between a Secure Tunnel direct connection and a Secure Tunnel Proxy connection.