[Samba] SAM LOGON & SAM Response - user unknown

Chris Hall
Sun, 18 May 2008 10:09:03 -0000

Samba: 3.0.28a

I'm staring at Wireshark output to try to see why one user can read a
particular cookie file from one machine, but the same user cannot read
it from a different machine.

I see:

  SMB_NETLOGON SAM LOGON request from client
  SMB_NETLOGON SAM Response - user unknown

The detail of the exchange is below.

The user name provided appears to be blank.  So this may not be a
surprise.

Is this significant, or is it a vestigial exchange ?

Chris
------------------------------------------------------------------------
SMB_NETLOGON SAM LOGON request from client

    SMB Header
        Server Component: SMB
        SMB Command: Trans (0x25)
        Error Class: Success (0x00)
        Reserved: 00
        Error Code: No Error
        Flags: 0x00
        Flags2: 0x0000
        Process ID High: 0
        Signature: 0000000000000000
        Reserved: 0000
        Tree ID: 0
        Process ID: 0
        User ID: 0
        Multiplex ID: 0
    Trans Request (0x25)
        Word Count (WCT): 17
        Total Parameter Count: 0
        Total Data Count: 88
        Max Parameter Count: 0
        Max Data Count: 0
        Max Setup Count: 0
        Reserved: 00
        Flags: 0x0000
        Timeout: 1 second
        Reserved: 0000
        Parameter Count: 0
        Parameter Offset: 0
        Data Count: 88
        Data Offset: 92
        Setup Count: 3
        Reserved: 00
        Byte Count (BCC): 111
        Transaction Name: \MAILSLOT\NET\NETLOGON
  SMB MailSlot Protocol
    Opcode: Write Mail Slot (1)
    Priority: 1
    Class: Unreliable & Broadcast (2)
    Size: 111
    Mailslot Name: \MAILSLOT\NET\NETLOGON
  Microsoft Windows Logon Protocol (Old)
    Command: SAM LOGON request from client (0x12)
    Request Count: 0
    Unicode Computer Name: ALCYONE
    User Name:
    Mailslot Name: \MAILSLOT\NET\GETDC834
    Account control  = 0x0000
    Domain SID Size: 24
    Domain: S-1-5-21-4211105910-4270789338-3787013593
    NT Version: 11
    LMNT Token: 0xffff (Windows NT Networking)
    LM20 Token: 0xffff (LanMan 2.0 or higher)

SMB_NETLOGON SAM Response - user unknown

    SMB Header
        Server Component: SMB
        SMB Command: Trans (0x25)
        Error Class: Success (0x00)
        Reserved: 00
        Error Code: No Error
        Flags: 0x00
        Flags2: 0x0000
        Process ID High: 0
        Signature: 0000000000000000
        Reserved: 0000
        Tree ID: 0
        Process ID: 0
        User ID: 0
        Multiplex ID: 0
    Trans Request (0x25)
        Word Count (WCT): 17
        Total Parameter Count: 0
        Total Data Count: 40
        Max Parameter Count: 0
        Max Data Count: 0
        Max Setup Count: 0
        Reserved: 00
        Flags: 0x0000
        Timeout: Return immediately (0)
        Reserved: 0000
        Parameter Count: 0
        Parameter Offset: 0
        Data Count: 40
        Data Offset: 92
        Setup Count: 3
        Reserved: 00
        Byte Count (BCC): 63
        Transaction Name: \MAILSLOT\NET\GETDC834
  SMB MailSlot Protocol
    Opcode: Write Mail Slot (1)
    Priority: 1
    Class: Unreliable & Broadcast (2)
    Size: 63
    Mailslot Name: \MAILSLOT\NET\GETDC834
  Microsoft Windows Logon Protocol (Old)
    Command: SAM Response - user unknown (0x15)
    Server Name: \\HESTIA
    User Name:
    Domain Name: RHEA
    NT Version: 1
    LMNT Token: 0xffff (Windows NT Networking)
    LM20 Token: 0xffff (LanMan 2.0 or higher)

--
Chris Hall   @ Home                                  +44 (0)7970 277 383
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