Issue: PPTP VPN can work with CISCO router or other server, but cannot work with Windows OS.
Main Cause and Solution:
| Item | Cause | Solution |
| 1 | Configuration is wrong | please check the configuration if correct. |
| 2 | Firmware | some windows OS is not good compatible with E-Lins router. Please try new firmware. |
| 3 | PPTP Server lost route for PPTP Client | refer router usermanual at chapter 3.3.7.2 PPTP. And here give an example for Windows2008 Server below. See below picture. |
