Shorewall users - Jan 2005 - List Suggestion for routing/ipsec discussion

Since I believe that questions reguarding Linux routing and IPsec are 
off-topic for this lists, can anyone point me to a good list for these 
questions?

I''m trying to figure out the routing for a network containing a mesh of
IPsec tunnels. (We now have almost 40 tunnels.)

Thanks,

A.