This section describes the support for automatic logon for APPC applications available in Microsoft® SNA Server version 3.0 with Service Pack 1 or higher. This feature requires specific configuration by the network administrator: For more information on configuring this feature, see the SNA Server online documentation.
The APPC application must be invoked on the LAN side from a client of SNA Server. The client must be logged into a Windows NT® domain, but can be any platform that supports SNA Server's APPC APIs.
The client application is coded to use "program" level security, with a special hard-coded APPC user name MS$SAME and password MS$SAME. When this session allocation flows from client to SNA Server, the SNA Server looks up the host account and password corresponding to the Windows NT account under which the client is logged in, and substitutes the host account information into the APPC attach message it sends to the host.
To use this feature for an APPC application, the user_id and pwd fields in the ALLOCATE or MC_ALLOCATE verbs must be hard-coded to this special string and security must be set to AP_PGM.