Im about to setup my first vpn, i have 2 sites with adsl, both static ip adds,a netgear dg834 adsl router and was thinking of buying a Netgear FVS318 VPN router for site 1. Will i be ok using the netgear 834 which has vpn pass thru at site 2? Or will i need the same vpn router at both sides to make a secure tunnel?