Windows 7  PPTP VPN service supports 128-bit encryption.
PPTP Server supports 46bit or 56bit encryption.

Need to specify client to use  46bit or 56bit encryption.

Go to properties page on Client PPTP dialup.

Select the Security tab.
Under Type of VPN:, from the drop-down list, select Point to Point Tunneling Protocol (PPTP).

Default Settings to :

Under Data encryption :

Require encryption (disconnect if server declines)

Change to :

Maximum strength encryption (disconnect if server declines)

This forces client to use 46 to 56bit encryption with PPTP server if server does not support 128bit encryption.

If PPTP server supports NO ENCRYPTION, then force client under :

Under Data encryption :

No encryption allowed (server will disconnect if it requires encryption)

 

PPTP DEFAULT-GATEWAY :

While working remotely I noticed my bandwidth would drop when I connected to our VPN.
It appeared that all internet packets were being routed through our VPN connection.

While this normally wouldn’t be a problem, I often found myself downloading large files and my
connection performance was limited to the available bandwidth to the VPN connection.

That’s when I learned about what a “split tunnel” vpn connection is.

With a “split tunnel vpn” connection, the internet traffic is routed through the local gateway connection.
All other network traffic works through the vpn connection as you would expect.

This is a feature that is available with Windows Vista and XP PPTP VPN connections,
but it isn’t the default setting.

Here is how you configure your VPN connection to use the local gateway:

1. Right click on your VPN connection and choose “properties”
2. Click on the “Networking” tab. This is where we will need to make changes to the TCP/IP settings
for your VPN connection. If you are using V6 IP addresses or V4, you’ll need to make the change in both
locations just to be sure.
3. Click on the “Advanced” button to get to the Advanced TCP/IP options
4. The VPN connection by default configures all packets to route to the remote server’s gateway.
We want to turn this option off by clicking on the “Use default gateway on remote network” option.

That’s it! Once you have made those changes you will notice your internet packets are no
longer automatically routing through the VPN server.