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- DOCUMENT:Q102974 14-JAN-1994 [W_NT]
- TITLE :REG: TCP/IP Transport Entries, PART 2
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- --------------------------------------------------------------
- The information in this article applies to:
-
- - Windows NT operating system version 3.1
- - Windows NT Advanced Server version 3.1
-
- The article contains REGISTRY entries for the TCP/IP Transport, Part 2.
- These subgroups are included:
-
- - FTP Server Service Entries for TCP/IP
- - NBT Parameters for TCP/IP
- - Streams Parameters for TCP/IP
- - Windows Sockets Entries for TCP/IP
- --------------------------------------------------------------
-
- This is the second of two articles on these entries; for the other
- entries, see "TCP/IP Transport Entries, Part 1."
-
- TCP/IP TRANSPORT ENTRIES
- ========================
-
- The various TCP/IP keys do not appear in the Registry unless TCP/IP is
- installed using the Network icon in Control Panel. With Registry Editor,
- you can modify the following parameters for the TCP/IP transport. This
- section does not include all the TCP/IP parameters that can be set using
- the Networks application in Control Panel.
-
- The startup parameters defined in this section are found in these subkeys
- of HKEY_LOCAL_MACHINE\SYSTEM\System\CurrentControlSet\Services:
-
- TCPIP\Parameters
- Adapter_name#\Parameters\TCPIP, (where adapter_name# indicates a
- Services subkey for a network adapter
- card)
- Ftpsvc\Parameters
- NBT\Parameters
- Streams\Parameters
-
- Parameters for network bindings for this service are described in the
- article "NetRules Subkey Entries." See also IsDomainMasterBrowser in the
- article "Browser Service Entries."
-
- FTP SERVER SERVICE ENTRIES FOR TCP/IP
- =====================================
-
- The following Registry path contains parameters that affect the behavior of
- the FTP server service component:
-
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Ftpsvc\Parameters
-
- The Ftpsvc subkey does not appear until you install the FTP service using
- the Network icon in Control Panel. Also, you must restart the FTP server
- service (Ftpsvc) using the Services icon in Control Panel for any changes
- to these values to take effect.
-
- There can also be an AccessCheck subkey under Ftpsvc, which allows access
- to FTP for new users. If the AccessCheck subkey exists, but cannot be
- opened, the user is refused FTP services. If the subkey exists but can only
- be opened for read access, the user is granted read-only FTP access. If the
- subkey does not exist, it is not used to influence FTP access. By default,
- this subkey does not exist and therefore has no impact on FTP operations.
- An administrator can create this Registry subkey and attach specific access
- controls. which will serve to control user access to the FTP service.
-
- AllowAnonymous REG_DWORD 0 or 1
- -----------------------------------
- Default: 1 (true - anonymous logins are allowed)
-
- Controls anonymous logins. Anonymous logins are only allowed if this value
- is non-zero (true).
-
- AnnotateDirectories REG_DWORD 0 or 1
- ----------------------------------------
- Default: 0 (false -do not send directory annotations)
-
- When this value is 1, every time a user changes directories (that is, sends
- the server a CWD command), an attempt is made to open a file named
- ~FTPSVC~.CKM in the new directory. If this file is found, its contents are
- sent to the user as part of the successful reply to the CWD command. This
- may be used to attach annotations to specific directories. This value is
- used as a default for new users. Users can toggle their own personal
- annotate directories flag with the site-specific CKM command (SITE CKM).
-
- AnonymousOnly REG_DWORD 0 or 1
- ----------------------------------
- Default: 0 (false -non-anonymous logins are allowed)
-
- When this value is 1, only anonymous logins are allowed. Otherwise, non-
- anonymous logins are allowed as well.
-
- AnonymousUserName REG_SZ UserName
- -------------------------------------
- Default: "Guest"
-
- Contains the anonymous login alias. When a user attempts an anonymous
- login, the username specified ("anonymous") is mapped to this Registry
- value for authentication and impersonation. The password for this account
- is stored in an LSA secret object named FTPD_ANONYMOUS_DATA.
-
- ConnectionTimeout REG_DWORD Seconds
- ---------------------------------------
- Default: 600 (10 minutes)
-
- Specifies the time to allow clients to remain idle before forcibly
- disconnecting them. This prevents idle clients from consuming server
- resources indefinitely. This value may be set to 0 if time-outs are not to
- be enforced. If set to 0, idle clients may remain connected indefinitely.
-
- DebugFlags REG_DWORD BitFields
- ----------------------------------
- Default: 0 (no debug output)
-
- Used only by the debugging (checked) builds of the FTP Server to control
- the output of various debugging information. This value is unused (and
- ignored) by retail builds.
-
- ExitMessage REG_SZ Message
- ------------------------------
- Default: "Goodbye."
-
- Specifies a signoff message sent to an FTP client upon receipt of a QUIT
- command.
-
- GreetingMessage REG_MULTI_SZ Strings
- ----------------------------------------
- Default: None (no special greeting message)
-
- Specifies the message (if this value exists in the Registry) to be sent to
- new clients after their account has been validated. In accordance with de
- facto Internet behaviour, if a client logs on as anonymous and specifies an
- identity starting with a '-' (minus), then this greeting message is not
- sent.
-
- HomeDirectory REG_EXPAND_SZ Path
- ------------------------------------
- Default: C:\
-
- Specifies the initial home directory for new clients. After a new client is
- validated, an attempt is made to change to this directory with the Chdir
- command. If this directory is inaccessible, the client is refused FTP
- services. If Chdir is successful, then an attempt is made to change to a
- directory with the same name as the clientÆs username. If this fails, an
- attempt is made to change to a directory called DEFAULT. If this fails, the
- current directory is left at home. If a new client connects and finds the
- home directory is inaccessible, an event is written to the event log.
-
- LogAnonymous REG_DWORD 0 or 1
- ---------------------------------
- Default: 0 (false -do not log successful anonymous logins)
-
- When this value is 1, all successful anonymous logins are logged to the
- system event log.
-
- LogNonAnonymous REG_DWORD 0 or 1
- ------------------------------------
- Default: 0 (false, that is, do not log successful non-anonymous logins)
-
- When this value is 1, all successful non-anonymous logins are logged to the
- system event log.
-
- MaxClientsMessage REG_SZ Message
- ------------------------------------
- Default: "Maximum clients reached, service unavailable."
-
- Specifies the message (if this value exists in the Registry) to be sent to
- a client if the maximum number of clients has been reached or exceeded.
- This indicates that the server is currently servicing the maximum number of
- simultaneous clients and is refusing additional clients. See
- MaxConnections.
-
- MaxConnections REG_DWORD 0 or 1
- -----------------------------------
- Default: 20
-
- Specifies the maximum number of simultaneous clients the server will
- service. This value may be set to 0 if there is to be no limit on
- simultaneous clients.
-
- MsdosDirOutput REG_DWORD 0 or 1
- -----------------------------------
- Default: 1 (true-directory listings will look like MS-DOS)
-
- When this value is 1, the output of the LIST command (usually sent as a
- result of a DIR command from the client) will look like the output of the
- MS-DOS dir command. If this value is 0, the output of the LIST command
- looks like the output of the Unix ls command.
-
- This value also controls slash flipping in the path sent by the PWD
- command. When this value is 1 (true), the path contains backward slashes
- (\). If this value is 0 (false), the path contains forward slashes (/).
- This value is used as a default for new users. Users can toggle their own
- personal MS-DOS directory output flag with the site-specific DIRSTYLE
- command (SITE DIRSTYLE).
-
- ReadAccessMask REG_DWORD BitFields
- --------------------------------------
- Default: 0 (all read access denied)
-
- This value is a bitmask and controls the read ability of the various disk
- volumes in the system. Drive A corresponds to bit 0, drive B corresponds to
- bit 1, drive C corresponds to bit 2, and so on. A user may only read from a
- specific volume if the corresponding bit is set.
-
- WriteAccessMask REG_DWORD BitFields
- ---------------------------------------
- Default: 0 (all write access denied)
-
- This value is a bitmask and controls the write ability of the various disk
- volumes in the system. Drive A corresponds to bit 0, drive B corresponds to
- bit 1, drive C corresponds to bit 2, and so on. A user may only write to a
- specific volume if the corresponding bit is set.
-
- NBT PARAMETERS FOR TCP/IP
- =========================
-
- NBT is the NetBIOS over TCP/IP service. Parameters for TCP/IP are also
- configured under NBT in the following Registry path:
-
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NBT\Parameters
-
- MaxPreload REG_DWORD Number
- -------------------------------
- Default: 100
-
- Specifies the maximum NBT number of entries for LMHOSTS that are preloaded
- into the NBT NetBIOS name cache. LMHOSTS is a file located in the directory
- specified by DatabasePath.
-
- NbProvider REG_SZ DLL name
- ------------------------------
- Default: _tcp
-
- This value is only present for network services that provide a NetBIOS
- interface. Its presence causes LanMan information to be maintained for the
- transport. The value data represents the RPC provider string used to select
- the proper DLL for interfacing RPC to the transport.
-
- NbtKeepAlive REG_DWORD Number in seconds
- --------------------------------------------
- Default: 0 (Do not generate NBT keep-alive traffic.)
-
- Specifies how often NBT will generate keep-alive traffic. When NBT
- determines that no activity has occurred on a connection for the specified
- time interval, it will generate keep-alive traffic to probe the connection.
- If TCP/IP is unable to deliver this traffic, it marks the connection as
- down and notifies NBT.
-
- PermanentName REG_SZ Unique name
- ------------------------------------
- Default: The value of IPAddress in dotted decimal
-
- Specifies the permanent name of the NetBIOS node for NBT. In many NetBIOS
- implementations, this is the MAC address. This name must be unique.
-
- STREAMS PARAMETERS FOR TCP/IP
- =============================
-
- The TCP/IP parameter for Streams are found under the following Registry
- path:
-
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Streams\Parameters
-
- MaxMemoryUsage REG_DWORD Number of bytes
- --------------------------------------------
- Default: No limit
-
- Specifies the maximum amount of memory that can be allocated to the Streams
- environment. Once this limit is reached, Streams will fail allocation
- requests made by Streams-based drivers.
-
- WINDOWS SOCKETS ENTRIES FOR TCP/IP
- ==================================
-
- All Windows Sockets parameters can be set by choosing the Network icon in
- Control Panel. These parameters are found in two locations, as shown here.
-
- HKEY_LOCAL_MACHINE\SYSTEM\
- CurrentControlSet\Services\Winsock\Parameters
- ---------------------------------------------
-
- Transports REG_Multi_SZ Strings
- -----------------------------------
- Default: Depends on installation
-
- Contains the Regisry key names of installed transports that support Windows
- Sockets. If TCP/IP is the only installed transport that supports Windows
- Sockets, then this value is Tcpip. The Windows Sockets DLL uses the strings
- in Transports to find information about each transport.
-
- HKEY_LOCAL_MACHINE\SYSTEM\
- CurrentControlSet\Services\TCPIP\Parameters\Winsock
- ---------------------------------------------------
-
- HelperDllName REG_EXPAND_SZ Path and filename
- -------------------------------------------------
- Default: Depends on the transport; %SystemRoot%\system32\wshtcpip.dll
- for TCP/IP.
-
- Specifies the name of the Windows Sockets helper DLL for the TCP/IP
- transport. This value is set by the Windows Sockets DLL and is not a user
- settable parameter.
-
- IRPStackSize REG_DWORD Number
- ---------------------------------
- Default: 4
-
- Specifies the number of IRP stack locations needed by AFD, the driver used
- for Windows Sockets. The default is sufficient for all existing transports,
- but new transports may be developed that need more IRP stack locations.
-
- Mapping REG_BINARY
- --------------------
- Default: Depends on transport
-
- Identifies the address families, socket types, and protocols supported by
- the transport. This value is set by the Windows Sockets DLL and is not a
- user settable parameter.
-
- MaxSockAddrLen REG_DWORD Octets
- -----------------------------------
-
- Specifies the maximum length of socket addresses for the INET sockets
- family. This value is set by the Windows Sockets DLL and is not a user
- settable parameter.
-
- MinSockAddrLen REG_DWORD Octets
- -----------------------------------
-
- Specifies the minimum length of socket addresses for the INET sockets
- family. This value is set by the Windows Sockets DLL and is not a user
- settable parameter.
-
- Reference: "The Windows NT Resource Kit for Operating System Version 3.1."
-
- Additional reference words: 3.10
- KBCategory:
- KBSubCategory: KEYREG
-
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- Copyright Microsoft Corporation 1994.