I have a IPSec/L2TP (PSK) VPN I'm connecting to with OSX's built in client through the System Preferences > Network (in Lion/10.7.2). The VPN gives me an IP of 10.0.1/24, but I need to access servers within the whole 10/8 and 172.16/16 range. By default the VPN will only route over 10.0.1/24, and if I want to access the other networks I need to select the "Send all traffic over VPN connection" checkbox. Is there an easy/sane way to specify the exact network ranges to route via the VPN so I don't have to send all my other traffic over it, and end up with problems like their firewall blocking google?
I imagine I could probably attack this with some command line
route directives, but that seems really clunky. I also heard someone in passing suggest I try Tunnelblick, but I'm not explicitly connecting to an OpenVPN server, and the configuration file for Tunnelblick looked extremely OpenVPN specific.
Update: This question is covered with answers at http://superuser.com/questions/4904/how-to-selectively-route-network-traffic-through-vpn-on-mac-os-x-leopard