TSX Gateway does not accept new connections, only if I restart the host.
First please run a system file scan, to see if there are any file violations on your system.
Open a command prompt as Administrator and type in "sfc /scannow".
Wait for this process to complete.
Second, check your event log for any errors or warnings right in the moment or before connecting to TSX Gateway.
Third, check if there are still any open connections on the destination host (Remote Desktop Server or XP/VS Server). Sometimes you exceed the numer of allowed connections on the destination host.
A reboot of the TSX Gateway Server will also terminate all active connections.