Method and apparatus for integration of network address translation and
source address security, including, but not limited to, determining
whether a gateway computer is integrated for network address translation
and source address security, is described. A client computer requests a
first address from the gateway computer and then requests a second
address from the gateway computer. The latter request is done with a
different client identifier that is nearly equivalent, except for one
bit, to the client identifier used for the prior address request. If the
gateway computer is integrated for network address translation and source
address security, in response to the latter request a public address will
be provided from the gateway computer to the client computer.
