We are a small company with a TMG firewall in a rather remote location where the DSL line we have cannot be upgraded to higher bandwidth. With that asymmetrical DSL line we generally have a correct browsing experience except when an upload is taking up the bandwidth.
During the upload VPN clients become very slow and not responsive. We have a second DSL line and I would like to pass all VPN traffic on that second DSL line and keep the first for all normal internet traffic.
Is this a supported configuration of TMG?
I would expect the steps to be:
- add an additional nic in the server, configure with fixed IP, no gateway (TMG can only have one gateway)
- connect that new nic to the second DSL line, forward VPN port on the DSL router
- in TMG create a new Network (named for example External-VPN) and select the new nic
- in TMG > Remote Access Policy > Select Access Networks and select that new 'External-VPN' Network.
- check/update firewall rules
I have searched online and don't find much about a second external nic dedicated to VPN. Is this something TMG can do? Anybody have experience with this type of config?