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RAS Server Security Authentication
When a Windows NT RAS server receives a call, it invokes the RasSecurityDialogBegin function of the registered RAS security DLL, if there is one. This call
notifies the security DLL to begin its authentication of the remote user. The RAS
server calls RasSecurityDialogBegin before performing its PPP or RAS authentication.
The RasSecurityDialogBegin call passes the following information to the security DLL:
- A port handle to identify the connection
- Pointers to buffers to use when communicating with the remote user
- A pointer to a RasSecurityDialogComplete function to call when the authentication has been completed
The port handle and buffer pointers are valid until the security DLL calls RasSecurityDialogComplete to terminate the authentication transaction.
The RasSecurityDialogComplete notifies the RAS server of the results of the security DLL's authentication
of the remote user. If the security DLL reports success, the RAS server proceeds
with its PPP and RAS authentication of the remote user. If the security DLL
reports that the remote user failed the authentication, or that an error
occurred, the RAS server hangs up and logs the error or failed authentication in the
Windows NT event log.
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