4.2 GETUNIXCREDSFROMNTUSERNAME_PROC
The client sends a SUNRPC packet to the User Name Mapping Protocol service that requests the POSIX account mapping for the Windows user "nfs-dom-1\administrator".
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Frame: + Ethernet: Etype = Internet IP (IPv4) + Ipv4: Next Protocol = UDP, Packet ID = 40198, Total IP Length = 96 + Udp: SrcPort = 965, DstPort = UNM(819), Length = 76 - Rpc: Call, Program = mapsvc, Procedure = GETUNIXCREDSFROMNTUSERNAME_PROC TransactionID: 1305299282 (0x4DCD4952) MessageType: Call - ServiceCall: RPCVersionNumber: 2 (0x2) ProgramNumber: mapsvc, 351455(0x00055CDF) ProgramVersion: 2 (0x2) ProcedureNumber: GETUNIXCREDSFROMNTUSERNAME_PROC - Credential: No Identity Authentication Flavor: No Identity Authentication AuthDataLength: 0 (0x0) - Verification: Flavor: No Identity Authentication AuthDataLength: 0 (0x0) - Unm: GETUNIXCREDSFROMNTUSERNAME_PROC Call - WindowsUserAccountName: - WindowsAccountName: 0x1 - UNMName: nfs-dom-1\administrator Length: 23 Data: nfs-dom-1\administrator Padding: Binary Large Object (1 Bytes)
The User Name Mapping Protocol service on the server responds with a SUNRPC response packet with the advanced map for Windows user "nfs-dom-1\administrator" to POSIX user "root" with UID 0 and GID 0, illustrated as follows.
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Frame: + Ethernet: Etype = Internet IP (IPv4) + Ipv4: Next Protocol = UDP, Packet ID = 20813, Total IP Length = 76 + Udp: SrcPort = UNM(819), DstPort = 965, Length = 56 - Rpc: Reply, Status = Message accepted, Detail = Call succeeded TransactionID: 1305299282 (0x4DCD4952) MessageType: Reply - ServiceReply: ReplyStatus: Message accepted - MessageAccepted: - Verification: Flavor: No Identity Authentication AuthDataLength: 0 (0x0) AcceptState: Call succeeded - Unm: GETUNIXCREDSFROMNTUSERNAME_PROC Reply - UnixCreds: - UnixAccountName: 0x1 - UNMName: root Length: 4 Data: root ID: 0 GidCount: 2 - GID: GID: 1 GID: 1