I am trying to create an IPSec tunnel between an RF560VPN and RedHat Linux. Can you tell me if this works and what I need to do for this?

Yes, it should work. Our RF660VPN products are based on Freeswan Linux, which works with the RF560VPN.

Here are settings for IPSec Linux:

1) Use IKE main mode
2) Use MD5
3) Use Group 2
4) 3DES
5) ESP only
6) Preshare key only
7) PFS (both side need to be enabled or disabled)