> It´s an IPSec problem. I don´t want to go into detail but you probably should try NAT-Traversal. > For the theory http://www.ipsec-howto.org/x180.html Okay, I've read the reference. If I understand correctly, I need to use a NAT methodology that implements "NAT Traversal" (the reference is a little vague on this; in fairness, it does say "There are no RFCs at the moment"). It might be therefore fair to say that the Linksys implementation includes NAT Traversal, enabling it to handle multiple IPSec passthrough connections. Which leads me to what I suppose was the original question, now slightly modified: does iptables support NAT Traversal?
