Patent ID: 6697354
Filing Date: 2004-02-24
Classification: H04L

Abstract:
A method of distributed network address translation, comprising:requesting from a mobile first network device on a first network with a first protocol, one or more locally-unique ports, from a second network device on the first network, to identify the first network device if the mobile first network device roams to a second external network; replacing one or more default or ephemeral ports on the mobile first network device with one or more locally-unique ports; and creating a combination network address for the mobile first network device with a locally unique port and an external network address for the first network to identify the mobile first network device if the mobile first network device roams to a second external network, wherein the first protocol is a Port Allocation Protocol comprising, a port allocation protocol request message, a port allocation invalidate message, and a plurality of combination network addresses including a locally unique port and an external network address for the first network, for distributed network address translation.