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5.3.1 Unauthorized Client Connecting to an SSTP Server

In this scenario, an unauthorized attacker poses as a valid SSTP client and tries to connect to a valid SSTP server. The HTTPS connection goes through because the server does not authenticate the client at the SSL/TLS layer. The connection MUST be terminated by the SSTP server at the PPP layer after determining that the client has no proper user credentials. For more information, see [RFC1661].

MS-SSTP_picte64cafe8-375b-eec3-1496-7405005419ec.png

Figure 9: Unauthorized client connecting to an SSTP server

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