I've never setup a VPN before, but I've been using linux for a while. My network admin says we use IPSEC to connect to the VPN concentrator, and I was reading a little on the VPN-HOWTO on tldp.org, but I kind of got stuck. He said just install the cisco vpn client but its not supported anymore, so I'm kind of shit out of luck on that front.
Is there any documentation on setting up a VPN using IPSEC? How does it differ from tunneling ppp through ssh - is it the same thing? Tunneling ethernet frames using PPP, through SSH over UDP?
Any info would be appreciated, as you can see, I'm totally lost