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How to modify the MTU Settings for VPN Connections
on XP
To modify the MTU settings for VPN connections, you need to add the ProtocolType DWORD
value, the PPPProtocolType DWORD value, and the TunnelMTU DWORD value to the
following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Ndiswan\Parameters\Protocols\0
To do so, follow these steps.
| 1. |
Click Start, click
Run, type regedit
in the Open box, and then click
OK. |
| 2. |
Locate and then click the following subkey in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NdisWan\Parameters
|
| 3. |
Add a Protocols subkey (if it does not already exist). To
do so:
| a. |
On the Edit menu, point
to New, and then click
Key. |
| b. |
Type Protocols, and then
press ENTER. |
|
| 4. |
Add a 0 (zero) subkey to the Protocols subkey. To do so:
| a. |
Click the Protocols sub key that you created in
step 3. |
| b. |
On the Edit menu, point
to New, and then click
Key. |
| c. |
Type 0 (zero), and then
press ENTER. |
|
| 5. |
Click the 0 subkey that you created in step 4. |
| 6. |
On the Edit menu, point to
New, and then click
DWORD Value. |
| 7. |
In the Value data box, type
ProtocolType, and then click
OK. |
| 8. |
On the Edit menu, click
Modify. |
| 9. |
In the Value data box, type
800, make sure
Hexadecimal is selected under Base,
and then click OK. |
| 10. |
On the Edit menu, point to
New, and then click
DWORD Value. |
| 11. |
Type PPPProtocolType, and
then press ENTER. |
| 12. |
On the Edit menu, click
Modify. |
| 13. |
In the Value data box, type
21, make sure
Hexadecimal is selected under Base,
and then click OK. |
| 14. |
On the Edit menu, point to
New, and then click
DWORD Value. |
| 15. |
Type TunnelMTU, and then
press ENTER. |
| 16. |
On the Edit menu, click
Modify. |
| 17. |
Under Base, click
Decimal, type the MTU size that you want in
the Value data box, and then click
OK. |
| 18. |
Quit Registry Editor. |
| 19. |
Restart your computer. |
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