PPPoE, D-Link 614+, Windows 98 and CheckPoint SecureRemote VPN 1

[bdemott]

Here's the problem:

The combination of the ISP PPPoE interface, the D-Link 614+ router and the CheckPoint SecureRemote VPN software, running on Windows 98 SE don't play nicely together.


Here's the solution:

The PPPoE and the D-Link 614+ need to have the MTU lowered to 1430. The default for PPPoE is 1492.

On the D-Link router you must upgrade the firmware to version 2.18. This allows you to change the MTU to 1430 on the WAN side. This stops the router from failing with TearDrop Attacks from the company's VPN connection.

On the Windows 98 machine the entries in the registry for TCP/IP must also have their MTU values changed to 1430.

If anyone else runs into this problem with PPPoE, D-Link 614+ and CheckPoint SecureRemote, pass this infomation allong to them.



In case your need to know how to edit the MTU values in the registry in Windows 98, I've include the following:
To run the Registry Editor, click on Start | Run

Type in: regedit.exe and click OK.

The MTU is set in the following key:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\NetTrans\

There will be several folders numbered 0001, 0002, etc. Find the numbered folder that contains DriverDesc "TCP/IP" and click on the folder once.

1. Click on Edit | New > String Value
2. Call it MaxMTU and hit Enter
3. Right Click on MaxMTU and select Modify
4. In Value Data, type: 1430 and hit Enter
5. Close the Registry Editor and reboot your computer.

 

[bdemott]

I sent the same information to d-link technical support and here is what I got back. If your going to buy one of their products you're pretty much on your own. If you don't what to deal with these kind of issues try buying linksys. It may cost more, but it's better engineered, and doesn't have these problems.


vvvvvvvvvvvvvvvvvv from d-link tech support vvvvvvvvvvvvvvv

Dear Byron DeMott,

Your Case ID is PTS8602466.

[Critical: Please do not change the subject line of your email when you reply. Leaving the subject line as it is will allow us to review your complete history and help us to better serve you.]

Note: No pre-sales question should be answered via Technical Support, all pre-sales suggestions should be considered invalid. Technical Support is not authorized to make product suggestions. Their responsibility is only to offer warranty support for non end of life (EOL) / last date of support (LDOS) products you currently own. Last date of support may be earlier than posted.

For Sales and Pre-Sales questions, please call toll-free 1-800 326 1688 menu option 1 or email sales@dlink.com

Date of Reply: 5/28/2003 2:09:49 AM

Products: DI-614+
Operating System: Windows 98 SE


Due to the complex nature of your request, it is best if you speak with a live technician to resolve the issue. Please call technical support at 877-45D-Link (877-453-5465). Technical support is available 24/7 to serve your needs.

If you have already called technical support and have a case ID, please reply with the following information and a technician will contact you:
*Case ID-
Name-
Phone Number-
Model Number-
Operating System-
Brief Discription of Problem-

* Due to the high volume of support requests, you must provide a case ID to receive a call back from a technician.

Thank you for networking with D-Link.

Sincerely,
Anthony Kottiath
D-Link Technical Support Team
============Begin of Original Message ============

Here's the problem:

The combination of the ISP PPPoE interface, the D-Link 614+ router and the CheckPoint SecureRemote VPN software, running on Windows 98 SE don't play nicely together.


Here's the solution:

The PPPoE and the D-Link 614+ need to have the MTU lowered to 1430. The default for PPPoE is 1492.

On the D-Link router you must upgrade the firmware to version 2.18. This allows you to change the MTU to 1430 on the WAN side. This stops the router from failing with TearDrop Attacks from the company's VPN connection.

On the Windows 98 machine the entries in the registry for TCP/IP must also have their MTU values changed to 1430.

If anyone else runs into this problem with PPPoE, D-Link 614+ and CheckPoint SecureRemote, pass this infomation allong to them.



In case your need to know how to edit the MTU values in the registry in Windows 98, I've include the following:
To run the Registry Editor, click on Start | Run

Type in: regedit.exe and click OK.

The MTU is set in the following key:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\NetTrans\

There will be several folders numbered 0001, 0002, etc. Find the numbered folder that contains DriverDesc 'TCP/IP' and click on the folder once.

1. Click on Edit | New String Value
2. Call it MaxMTU and hit Enter
3. Right Click on MaxMTU and select Modify
4. In Value Data, type: 1430 and hit Enter
5. Close the Registry Editor and reboot your computer.


============End of Original Message ============