Windows 7 Client Development for VPN

Project Period & Property

Designed and developed by myself and takes about 2 months.

Background

I needed to re-create the client based on .NetFramework to create a VPN client on Windows 7.
New client has improved VPN line switching algorithm on Windows XP based client.

Check

• Efficient programming method based on .NetFramework.
  • Develop client using C#.
  • Delegate the driver-related part to the .NetFramework.
• User access control after Windows Vista.
  • Since Windows Vista, the UAC policy has been added so the program does not automatically run with administrator privilieges.
  • I need administrator priviliege to communicate with the driver and modify network settings.
  • Modifying the manifest file to elevate permissions after build.
• HSSP (Hot Stand by Switching Protocol).
  • A proprietary protocol for communication between the driver and the client.
  • Check speed with VPN server to help switch to faster VPN line.
  • Proper algorithms are needed to prevent wasted switching.

Technical Summary

• Develop Windows 7 client using C# and .NetFramework.
• Modify manifest file to bypass UAC policy.
• Developed “Hot Stand by Switching Protocol”.

Content

TBD