REG: Network Services Entries, Part 7ID: Q103003
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The article contains Registry entries for network services, Part 7.
These subgroups are included:
- RAS NetBIOSGateway Subkey
- RAS AsyncMac Subkey
- RAS RasHub Subkey
- RAS RasMan Subkey
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Rdr\ Parameters
Specifies the maximum amount of time the redirector will wait for a
connect or disconnect to complete. Default: 300 (5 minutes)
Specifies the number of bytes the redirector will use for small
searches. Default: 16K
Specifies the number of bytes below which the redirector will
request a search of LowerSearchBufferSize. If the search size is
larger than this (but below the UpperSearchBufferSize), the
redirector will use the UpperSearchBufferSize. Default: 16K
Sets the default IRP stack size for the redirector. Default: 4
Specifies the number of bytes the redirector will use for large
searches. Default: 32K
Enables the asynchronous-write-behind variation of the write-behind
optimization. Default: 1 (true)
Enables the write-behind optimization. Default: 1 (true)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
\RemoteAccess\Parameters
Sets the maximum number of unsuccessful retries allowed if the
initial attempt at authentication fails. Default: 2
Sets the maximum time limit within which a user must be
successfully authenticated. If the client does not initiate the
authentication process within this time, the user is disconnected.
Default: 120 seconds
Sets the time interval that the server waits before calling the
client back when the Callback feature has been set. Each client
communicates the value of its own callback time when connecting to
a Remote Access server. If this value is not communicated (that is,
if the client does not communicate a value for the callback time,
as with Remote Access 1.0 and 1.1 clients), the value of the
CallbackTime parameter becomes the default. Default: 2 seconds
Determines whether Remote Access auditing is turned on or off. If
this feature is enabled, all audits are recorded in the Security
event log, which you can view using Event Viewer. Default: 1
(enabled)
CAUTION: Do not change this value in Registry Editor, because
various network bindings must also be changed. This parameter
should be changed only by using the RAS Setup program.
Makes the server function like a NetBIOS gateway, allowing clients
to access the LAN. If disabled, remote clients can access only the
resources on the Remote Access server in a point-to-point
connection; dial-in users cannot see the network or access network
resources. Default: 1 (enabled)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services \RemoteAccess\Parameters\NetbiosGateway
Sets the time interval after which inactive connections are
terminated. Inactivity is measured by lack of NetBIOS session data
transfer, such as copying files, accessing network resources, and
sending and receiving electronic mail. You may want to set this
value to 0 seconds if clients are running NetBIOS datagram
applications. Setting this value to 0 turns off AutoDisconnect.
Default: 1200 seconds (20 minutes)
Allows NetBIOS session traffic (for example, Windows NT
applications) to have priority over multicast datagram (such as
server messages). In other words, multicast datagram are
transferred only when there is no session traffic. Unless you're
using an application that depends on multicast datagram, leave
this parameter enabled. Default: 1 (enabled)
Determines whether broadcast datagram are forwarded to remote
workstations. Broadcast datagram are not often useful and take up
too much bandwidth on a slow link. Unless you're using an
application that relies on broadcast datagram, leave this
parameter disabled. Default: 0 (disabled)
Enable this parameter to record in the event log the establishment
of NetBIOS sessions between the remote clients and the LAN servers.
Enable this parameter to track the NetBIOS resources accessed on
the LAN. Default: 0 (disabled)
Sets the number of broadcast datagram that the gateway buffers for
a client. If you're using an application that communicates
extensively through multicast or broadcast datagram, increase this
parameter so that the Remote Access server can deliver all
datagram reliably. Default: 32
Sets the number of datagram that can be buffered per group name.
Increasing this value buffers more datagram per group name but
also takes up more virtual memory. Default: 10
Sets the amount of virtual memory used to buffer NetBIOS session
data for each remote client. Because the Remote Access server is a
gateway between the slow line and the LAN, data is stored
(buffered) in its memory when coming from the fast line (LAN)
before it is forwarded to the slow line (asynchronous line).
The Remote Access server minimizes the usage of the system's
physical memory by locking only a minimal set of pages (about 64K
per client) and making use of virtual memory (up to MaxDynMem) to
buffer the rest of the data. So, as long as there is enough space
on the hard disk to expand PAGEFILE.SYS, you can increase this
value if needed.
If you have an application with a LAN (fast) sender and an
asynchronous (slow) receiver, and if the sender is sending more
data at a time than the Remote Access server can buffer in
MaxDynMem, the Remote Access server tries to apply a form of
NetBIOS level flow control by not submitting NCB.RECEIVE on the
session until it has enough buffer space to get incoming data. For
this reason, if you have such an application, you should increase
your NetBIOS SEND/RECEIVE timeouts so that the fast sender can keep
pace with the slow receiver. Default: 655350
Sets the number of unique NetBIOS names each client can have, with
a limit of 255 names for all clients together. Remote clients
running Windows NT and Windows for Workgroups may need as many as
seven or eight names each. To accommodate these workstations, set
the MaxNames value to 8 and reduce the number of ports on the
Remote Access server. If you have Windows NT or Windows for
Workgroups clients dialing in to servers running Remote Access
version 1.1 or earlier, set this parameter to 8 or greater.
Default: 255
Sets the maximum number of simultaneous NetBIOS sessions each
client can have, with a limit of 255 sessions for all clients
together. If you have multiple clients connecting simultaneously
with each running 4 or 5 sessions, decrease the value of this
parameter so that the total number of sessions does not exceed 255.
Default: 255
Governs the multicasting of group name datagram to all remote
workstations. This parameter filters datagram sent on group names
by forwarding them at a specified time interval. The value -1
disables forwarding. The value 0 guarantees delivery of group name
datagram. The value n forwards datagram every n seconds, when 1 is
less than or equal to n less than or equal to 32,676. If the
EnableBroadcast parameter is set to 0, broadcasts are not forwarded
even if the MultiCastForwardRate parameter is set to a positive
number (in this case, only multicast datagram are forwarded). The
line becomes overloaded. If MultiCastForwardRate is set to -1,
broadcasts are still not forwarded even if EnableBroadcast is set
to 1. See also EnableBroadcast.
To save bandwidth for session traffic, filter the datagram.
However, if you have an application based on multicast datagram,
set this parameter to 0. This value guarantees delivery of all
datagram sent on group names from the LAN to the remote client.
Default: 5
Allows a Remote Access client to initiate multiple network
connections simultaneously. If a remote client is running a NetBIOS
application that does multiple NCB.CALL commands simultaneously,
increase this parameter to improve performance. Default: 3
Determines the number of NetBIOS commands of the type Receive
Datagram that can be submitted simultaneously per group name on the
LAN stack. Keep this setting as small as possible to minimize the
amount of memory consumed by system resources. Each datagram
command received locks about 1.5K of physical memory in the system.
Default: 3
Sets the remote NCB_LISTEN capability.
Value Meaning
----------------------
0 Disables a client's ability to post
NCB_LISTEN for any NetBIOS name. Because
every remote listen posted consumes one
session, setting this parameter to 0 saves
sessions.
1 Messages. Allows clients to post
NCB_LISTEN on Windows NT Advanced Server
message aliases only. If a remote client
is running the Messenger service, it can
then receive messages from LAN users,
printers, and the like.
2 All. Enables NCB_LISTEN for all remote
client NetBIOS names, allowing clients
to run NetBIOS server applications. This
setting allows all clients to function
as NetBIOS servers on the network.
It is best to leave the RemoteListen parameter set to the default,
1 (messages). Allowing NCB_LISTEN capability on remote clients can
significantly drain system resources and therefore is not
recommended.
If the RemoteListen parameter is set to 2, Remote Access posts an
NCB_LISTEN on all NetBIOS names of Remote Access clients. Because
the average Windows NT Advanced Server workstation has about seven
or eight NetBIOS names assigned to it, the total number of NetBIOS
names for which an NCB_LISTEN would be posted is 7 or 8 * 64 (the
maximum number of clients per Remote Access server), which exceeds
the 255 maximum. Default: 1 (messages)
Sets the size of work buffers. The default setting is optimized for
the server message block (SMB) protocol, the protocol between the
workstation and the server running on the Windows NT Advanced
Server system. Default: 4500
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
\AsyncMacn\Parameters
Determines the maximum frame size. Use smaller frames for noisy
links. A lower setting sends less data per frame, slowing
performance. Do not change this parameter for previous versions of
the Remote Access service. The value is negotiated between the
server and Windows NT clients. Default: 1514
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasHub \Parameters
Reassigns the first four bytes of the 6-byte IEEE address. For
example, for the address "03-1F-2C-81-92-34" only the first four
bytes are looked at.
Some applications depend on an IEEE adapter address being
available. However, because the Remote Access Service uses modems
(not real Ethernet adapters), it does not have an IEEE Ethernet
address per se. This parameter lets you manually set an IEEE
adapter address for Remote Access adapter bindings where
applications demand it.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan
\Parameters
Turns on information tracking for the modem using the DEVICE.LOG
file. Set this value to 1 if you have modem problems that you
cannot solve following documented procedures in the Microsoft
Windows NT Remote Access Administrator's Guide. Logging begins the
next time you dial in to connect through RAS (you do not need to
restart your computer for the DEVICE.LOG file to be created). Additional query words: wfw wfwg prodnt
Keywords : kbother ntregistry
Version : 3.1
Platform : WINDOWS
Issue type : Last Reviewed: January 14, 1999