PPTP base VPN as provided by microsoft server 2008 R2
I have a PPTP based server at main location.
I have a Cisco Router running IOS 15.X at this location too.
I have a Cisco/Linksys E1000 at remote location.
When I connect a single client to the VPN at remote site it connects and performs well.
When I add a second client the first client and the second client no longer can pass traffic to main sites network.
When at different location that do not have Cisco/Linksys E1000 Firewall I can pass multiple clients to the VPN without any problems or disconnects.