Windows NT 4 --- VPN problem ---

[alanpaterson]

Hello everyone,

I'm hoping this is a simple problem and I've overlooked something.

I have a bog standard Windows NT 4.0 server sp6a high encryption at work, I have set up the PPTP on it and done everything I can think of to give people access to it from home.

I have tested this from home and it works very well, I get the MSCHAPv2 and 128Bit encryption which should be good enough for what I want. The server sits behind a Netgear RP114 where the port 1723 is forwarded to the internal IP address of the NT4.0 machine.

This is all working great, I can map drives, I can connect to our AS400 system, I can ping anything on our network, I can take control via VNC, etc.. but it disconnects after about 5-10 minutes of use. You can reconnect again and its fine, but it keeps disconnecting for some reason?

I'm using a 512k broadband connection at home and it is a 1MB broadband connection at work.

Is it a speed problem? Or something different.

Heres hoping someone can help.


Thanks
Alan Paterson

 

[gacollier]

Alan,

What entries are in the event viewer (Security and System) for the NT box at those times?

 

[alanpaterson]

Hi,

I looked in the event viewer and here is what was in the system log, the security seemed fine.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20107
Date: 24/03/04
Time: 22:25:56
User: N/A
Computer: KAYAK
Description:
The user pdougherty connected to port VPN3 using strong encryption.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20017
Date: 24/03/04
Time: 22:25:56
User: N/A
Computer: KAYAK
Description:
The user INTER04\pdougherty has connected and has been successfully authenticated on port VPN3.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20019
Date: 24/03/04
Time: 22:30:55
User: N/A
Computer: KAYAK
Description:
The user INTER04\pdougherty has disconnected from port VPN3.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20050
Date: 24/03/04
Time: 22:30:55
User: N/A
Computer: KAYAK
Description:
The user INTER04\pdougherty connected on port VPN3 on 03/24/2004 at 10:25pm and disconnected on 03/24/2004 at 10:30pm. The user was active for 4 minutes 58 seconds. 331021 bytes were sent and 211387 bytes were received. The port speed was 100000000. The reason for disconnecting was user request.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20107
Date: 24/03/04
Time: 22:33:39
User: N/A
Computer: KAYAK
Description:
The user pdougherty connected to port VPN4 using strong encryption.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20017
Date: 24/03/04
Time: 22:33:39
User: N/A
Computer: KAYAK
Description:
The user INTER04\pdougherty has connected and has been successfully authenticated on port VPN4.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20107
Date: 24/03/04
Time: 22:45:24
User: N/A
Computer: KAYAK
Description:
The user pdougherty connected to port VPN5 using strong encryption.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20017
Date: 24/03/04
Time: 22:45:25
User: N/A
Computer: KAYAK
Description:
The user INTER04\pdougherty has connected and has been successfully authenticated on port VPN5.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20019
Date: 24/03/04
Time: 22:45:36
User: N/A
Computer: KAYAK
Description:
The user INTER04\pdougherty has disconnected from port VPN4.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20050
Date: 24/03/04
Time: 22:45:36
User: N/A
Computer: KAYAK
Description:
The user INTER04\pdougherty connected on port VPN4 on 03/24/2004 at 10:33pm and disconnected on 03/24/2004 at 10:45pm. The user was active for 11 minutes 58 seconds. 2708584 bytes were sent and 463370 bytes were received. The port speed was 100000000. The reason for disconnecting was user request.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20019
Date: 24/03/04
Time: 22:55:56
User: N/A
Computer: KAYAK
Description:
The user INTER04\pdougherty has disconnected from port VPN5.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20050
Date: 24/03/04
Time: 22:55:56
User: N/A
Computer: KAYAK
Description:
The user INTER04\pdougherty connected on port VPN5 on 03/24/2004 at 10:45pm and disconnected on 03/24/2004 at 10:55pm. The user was active for 10 minutes 32 seconds. 6061821 bytes were sent and 229973 bytes were received. The port speed was 100000000. The reason for disconnecting was user request.

Quite puzzling as I didn't request disconnection... :*(

 

[alanpaterson]

I thought I would include these, which are the events from the Windows 2000 pro machine I'm using at home.

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20158
Date: 25/03/2004
Time: 19:59:18
User: N/A
Computer: ALAN
Description:
The user pdougherty successfully established a connection to Virtual Private Connection using the device VPN2-1.

Event Type: Warning
Event Source: MRxSmb
Event Category: None
Event ID: 3019
Date: 25/03/2004
Time: 20:01:18
User: N/A
Computer: ALAN
Description:
The redirector failed to determine the connection type.
Data:
0000: 00 00 00 00 04 00 4e 00 ......N.
0008: 00 00 00 00 cb 0b 00 80 ....Ë..?
0010: 00 00 00 00 84 01 00 c0 ....?..À
0018: 00 00 00 00 00 00 00 00 ........
0020: 00 00 00 00 00 00 00 00 ........

Event Type: Warning
Event Source: MRxSmb
Event Category: None
Event ID: 3019
Date: 25/03/2004
Time: 20:01:25
User: N/A
Computer: ALAN
Description:
The redirector failed to determine the connection type.
Data:
0000: 00 00 00 00 04 00 4e 00 ......N.
0008: 00 00 00 00 cb 0b 00 80 ....Ë..?
0010: 00 00 00 00 84 01 00 c0 ....?..À
0018: 00 00 00 00 00 00 00 00 ........
0020: 00 00 00 00 00 00 00 00 ........

Event Type: Information
Event Source: RemoteAccess
Event Category: None
Event ID: 20159
Date: 25/03/2004
Time: 20:05:34
User: N/A
Computer: ALAN
Description:
The connection to Virtual Private Connection made by user pdougherty using device VPN2-1 was disconnected.

It kind of looks like my win2000 machine causing the problem. TCP versions different?

Cheers,

Alan