Concurrent connections on a Microsoft VPN Server.

Hi all,

I am using a windows 2003 std. edition, and i have created it as a VPN server also having AD running on it.

I need to know 2 things.

1. Is there a option of finding which are all the user is having dial-in permission.

2. I wanted to know if u can stop concurrent user logging in to the VPN server on a same UserName and password. Is there a way to restrict one sure should have only only connection with the VPN server.

TIA

Ganesh