A method for delivering at least one data packet is disclosed originating from a corresponding node in a corresponding network to a mobile node having a home network and being connected to a foreign network different from said home network, the mobile node having a long term IP address belonging to said home network and a care-of-address being the address of an foreign network access router of said foreign network, said networks being connected to an IP network comprising at least one data storage, by respectively a home network access router, a corresponding network access router, and said foreign network access router, the method comprising: a. intercepting said at least one data packet and detecting the destination IP address thereof; b. consulting said at least one data storage, whereby said care-of-address of said mobile node is retrieved by using the destination IP address of said at least one packet; c. forwarding said at least one data packet directly to said care-of-address, and indicating said long term IP address to said foreign network access router.