I've seen this issue has been logged a few times in the past, but none of the tips mentioned have resolved my issue, so I'm posting a new thread.
Basically we have a problem where any of our staff who are connected remotely as a VPN client to our network are limited to around 1.5-2Mbps upload or download from our head office to their home. Whereas our internet connection is capable of just over 5Mbps
up/down. So if a remote user connects to the VPN, then maps a network drive to one of the servers in our head office and copies a large file down to their laptop/PC, the maximum file copy speed is only about 1.5-2Mbps.
This speed limit only seems to be restricted to VPN Clients accessing via the Forefront TMG server. For example if the same remote user disconnects from the VPN, then downloads a file from our head office via ourFTP site (which uses the same network connection, just a different protocol and therefore different Firewall Policy rule), they achieve the maximum expected bandwidth speeds of around 5Mbps up/down. Same goes for HTTP traffic from within the head office downloading via Forefront TMG. Speedtest.net shows the expected 5Mbps for internet traffic through the firewall.
Any suggestions or ideas as to why this is the case? Here's some info about our configuration.
Forefront TMG 2010 server v7.0.9193.575 (SP2, Rollup 3) running on Windows Server 2008 R2 enterprise SP1 (as a VM).
Forefront TMG Server VM hosted on Windows Server 2012 R2 with internal/external NIC's allocated to the TMG VM.
Network Load Balancing disabled.
Malware Inspection disabled
