rcbarnes Aug 2012 Posts: 38
I'm running Tomato Firmware v1.28.7498 MIPSR2-Toastman-VLAN-RT K26 USB VPN-NOCAT, so YMMV, but I believe all currently-maintained versions of Tomato (particularly TomatoUSB) will match my interface so long as they have VPN support at all.
Click VPN Tunneling menu, then OpenVPN Client submenu
Choose the Client 1 tab and then Basic tab below
Check Start with WAN if you want to auto-connect whenever your router is online/starts up
Set Interface Type to TUN
Set Protocol to UDP