I need to setup a connection between two VPN servers
 

Hello,
Please I need help with this scenario (I'm still a little green in this area of vpns with linux so please bear with me)
I was recently asked to configure a vpn between two library locations and the setup is like this
LAN -> Linux Server -> ADSL Modem <-> ADSL Modem <- Linux Server <- LAN

Both servers are Redhat distributions and have 2 NICs each (one to the LAN and one to the ADSL modem). How do I go about this?

I'd really appreciate all the help I can get right now. Thanks so much.

Well first you need to decide on a VPN solution such as pptp, openVPN(SSL) openswan, other IPSec VPN solutions. I would recommend OpenVPN myself. Once you decide on a solution it will be much easier to get information regardign the solution and easier for us to assist you with implementation