A method and apparatus for use in data processing system for selecting rules to filter data for a tunnel. A request is received to create a tunnel to another data processing system. A granularity of information about the data processing system is identified to form an identified granularity. The identified...http://www.google.de/patents/US6738909?utm_source=gb-gplus-sharePatent US6738909 - Method and apparatus for automatic configuration for internet protocol security tunnels in a distributed data processing system
