Hello I just subscribe for a dedicated server and plan to configuration it so that it can be use as a VPN server I want a software for authorization the user who connect to my server Something like what Dial up ISP's use as a billing software. with this software, I want to create bandwidth account and give to my client.for example 100 MB VPN account. so client can access my server and only can use certain amount of bandwidth which the account has. Also hourly and monthly accounts. For example users who get monthly account can use my VPN server for one month and so on. I wanna know if there is such a software which can have the above features. Thank you very much