I am trying to have 10 PCs to concurrently connect to my windows server 2008 R2 Enterprise via L2TP VPN. The problem that I am facing now is that after connecting 2 PCs via VPN, a third one cannot connect at all. I have tried disconnecting all VPN connection and used the third PC's and its account to connect. It works.
I am using window's "Routing and Remote Access" for the L2TP VPN.
Anyone knows how to solve this problem?