Routing traffic towards a mobile node

摘要

A method of allowing a data connection between a first node attached to a private IP network and a second node external to the private IP network and connected to a public IP network. The method comprises allocating a private network IP address, a hostname, and a service name to said first node, the service name associated with a service provided by the first node. A gateway allocates a unique public network side port number to the first node. A mapping between the private network IP address and public network side port is included in a connection table. Records are installed in a Domain Name System of the public IP network that include: a service record defining said hostname and public network side port number as the location for said service name; and an address record defining a public IP address of said gateway as the location for said hostname.

主权项

1. A method of allowing a data connection to be made between a mobile node attached to a private IP network and a node external to the private IP network and connected to a public IP network, the method comprising:
allocating a private network IP address, a hostname, and a service name to said mobile node, the service name being associated with a service provided by the first node; at a gateway interconnecting said private and public IP networks, allocating a unique public network side port number to the mobile node and including, in a connection table, a mapping between said private network IP address and said public network side port; and installing in a Domain Name System, DNS, of the public IP network,
a service, SRV, record defining said hostname and public network side port number as the location for said service name, andan address, A, record defining a public IP address of said gateway as the location for said hostname, wherein said node external to the private IP network is able to perform a DNS lookup in the public IP network in order to resolve said service name into a public IP address and port number and said gateway listens at said public side network port number for connection attempts to said mobile node.