[Openswan Users] Routing to/from a vpn

[Jason Brooks]

Hello,

I am trying to setup a vpn between three sites and a main site.  The  
vpn itself traverses the Internet.  Each site has multiple hosts.   
Eventually, I want each site to be able to talk to each other  
directly, but I will handle that later.

I have run into some confusion reading through ipsec and openswan  
documentation.  It appears that openswan on a linux gateway uses  
something akin to packet filter rules: "x ip address range may talk to  
Y ip address range" as an example.  Does the gateway also have a  
corresponding routing table entry that will route packets to the vpn?   
Once the vpn is established, can I have the endpoints exchange routing  
data with something like RIP?

Thank you for your time...


--jason