Method and apparatus for Internet Protocol Security (IPSec) and Network
Address Translation (NAT) integration is described. A client obtains a
public address from a gateway for IPSec communication. A mapping table is
used to form associations between a local address for the client and a
destination address for a peer, an Internet Security Association and Key
Management Protocol (ISAKMP) Initiator Cookie and a Security Parameters
Index associated with communication between the client and the peer.
Incoming and outgoing routing may be done at the gateway using the
mapping table.
