I have a user that is having trouble VPN to the office. What are you top troubleshooting things to try to find out where the problem is.
The error the user is getting is Error 806 - a connection between your computer and the VPN server has been established but the VPN connection cannot be completed. The most common cause for this is that there is at least one internet device between your computer and the VPN server is not configured to allow GRE protocol packets Verify that protocol 47 GRE is allowed on all personal firewall devices or routers. if the problem persists, contact your administrator.
This sounds like a problem with the users router which is blocking VPN traffic. Does anyone have any tips for fixing this error.