1001 Secrets for Windows NT Registry
(Publisher: 29th Street Press)
Author(s): Tim Daniels
ISBN: 1882419685
Publication Date: 12/01/97

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I-415 You must also change this registry entry to disable VJ compression:

Hive: HKEY_LOCAL_MACHINE
Key: System\CurrentControlSet\Services\RasMan\IPCP\ Parameters
Value Name: AcceptVJCompression
Data Type: REG_DWORD
Value: 0

You must restart RAS for this change to take effect.

I-416 If you want to keep track of who is using your RAS server by having RAS write in the Event Log, change this entry.

Hive: HKEY_LOCAL_MACHINE
Key: System\CurrentControlSet\Services\RasMan\ Parameters

Add the following value under the Parameters key:

Value Name: Logging
Data Type: REG_DWORD
Value: 1

I-417 You recently established service with an ISP. The problem is, you can ping the LAN before you dial up your ISP, but not after. Modify these registry entries to fix this problem.

Hive: HKEY_LOCAL_MACHINE
Key: System\CurrentControlSet\Services\RasMan\PPP\IPCP

Add the following value under the IPCP key:

Value Name: PriorityBasedOnSubnet
Data Type: REG_DWORD
Value: 1

I-418 Hive: HKEY_LOCAL_MACHINE
Key: System\CurrentControlSet\Services\RasMan\ Parameters\PPP
Value Name: Logging
Data Type: REG_DWORD
Value: 1

This value controls the logging action of PPP events that the RAS server handles. A value of 1 enables logging and 0, the default, disables logging.

I-419 If you recently added Internet access to your LAN via the RAS server and can get out just fine but everything coming back stops at the default gateway machine, then change this registry entry.

Hive: HKEY_LOCAL_MACHINE
Key: System\CurrentControlSet\Services\RasArp\ Parameters

Add the following value under the Parameters key:

Value Name: DisableOtherSrcPackets
Data Type: REG_DWORD
Value: 0

Now all your Internet data will make it back to the right machine.

I-420 Are you having problems with your dial-up connections? Are you getting more retries than you should? You may need to enable the FIFO buffer on your serial card (if you have one, and you should). In addition, you may want to lower the receive buffer. These registry entries let you govern the size of the FIFO buffer for both receiving and transmitting.

Hive: HKEY_LOCAL_MACHINE
Key: System\CurrentControlSet\Services\Serial:
Value Name: ForceFifoEnable
Data Type: REG_DWORD
Value: 1

Enable the FIFO buffer by setting this value to 1. Restart the machine and see if this helps. If you still experience problems, try reducing the value of the receive FIFO buffer to 4; if you still have problems, drop it to 1.

I-421 Value Name: RxFIFO
Data Type: REG_DWORD
Value: 4

This value governs the receive buffer.

I-422 Value Name: TxFIFO
Data Type: REG_DWORD
Value: 8

This value governs the transmittal buffer.

I-423 Have you noticed that your laptop seems to receive files when you’re connected to the corporate Ethernet but chokes when you’re connected at a lesser speed (i.e., on a 28.8 modem connection)? Try modifying this parameter.

Hive: HKEY_LOCAL_MACHINE
Key: System\CurrentControlSet\Services\TCPIP\ Parameters

Add the following value under the Parameters key:

Value Name: TcpWindowSize
Data Type: REG_DWORD
Value: 8192

Generally, slower connections benefit from a higher value; however some RAS connections work better with the value set to around 2768. For maximum efficiency, this value should be an even multiple of the TCP maximum segment size.


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