I run a network that has 7 different offices and a central office where I am now. Each office is connected to the central office via VPN and they all have just the regular Netgear FVS114 Prosafe VPN Routers. I have always used 3DES for the encryption method but I just today saw on Netgear's website that the throughput for VPNs over 3DES is only 2.1 Mbps! I feel like a total idiot that I'm a network guy and I didn't realize VPN's have a significantly lower throughput than what the regular internet connection would be at that particular location. Some of these locations have a 15mbps down/up internet connection and now it makes sense why their connection to us here at the central office sucks.
My question is: Is there a VPN firewall out there that is cheap/affordable that also has a decent amount of throughput? Or, is there a way to get a significantly higher amount of throughput with the model I already have (FVS114 Netgear) by using a different encryption method? I'm sad to say I've just never realized there was such a drop in total throughput with VPN's so I feel I should ask people who have more experience than me. Thanks guys!