Hello,
Here's my setup
* BT Business Hub 6 - running on 4G Assure, because our fibre hasn't been installed yet
* Windows Server 2012 R2
* Multiple external client machines
Here's my configuration
* BT Business Hub - port forwarding TCP 1723 to the internal static IP address assigned to my server
* Windows Server 2012 R2 - running Routing and Remote Access Server configured for PPTP, with a statically defined IP address, and windows firewall ports opened for PPTP and our user application.
* Client machines running Windows 10, using Windows internal VPN provider configured for PPTP - over a variety of different originationg networks (Virgin, BT, EE) - accessing a TCP application running directly on the server
Here's the scenario:
* User #1 connects to the VPN, and can pass ping and data as expected to the application
* User #2 connects to the VPN, and can do the same UNTIL they transfer about 800kBytes into the application.
* User #1 has continuining uninterrupted access
* User #2 can ping the server machine, but there's no data transfer and TCP sockets can't be opened.
* User #1 disconnects the VPN, but can now not re-connect. It appears the TCP socket connection is opened, but no data is transferred (e.g. authentication credentials)
* User #2 disconnects the VPN, but also cannot re-connect
* After a timeout period (which I haven't worked out), one of the users can re-connect again.
Is this a known issue - multiple concurrent inbound VPN users not properly supported by the NAT on the Business Hub?
Any advice welcome - I need concurrency on inbound VPN connections at the moment.
Nick
