Patent ID: 7668145
Filing Date: 2010-02-23
Classification: H04L,H04W

Abstract:
1. A method, comprising: controlling a connection by a packet filtering function, filtering packets such that a packet is discarded in case one of a source address and a destination address do not comply with a filtering rule; changing an address of at least one of a first network node and a second network node; informing the packet filtering function about a new address of at least one of the first and second network node having changed its address; updating a packet filter of the packet filtering function by using the new address of the at least one of the first and second network node having changed its address; and checking, upon receiving the new address of the at least one of the first and second network node, whether this is a first time during the connection that the at least one of the first and second network node changes its address; and if it is the first time, regarding an old address as a home address, and regarding the new address as a care-of address, maintaining a current packet filter as a home address filter, and creating a new packet filter based on the new address by copying the current packet filter and using the new address instead of the old address for a corresponding address in the new packet filter, and using the new packet filter to filter packets.