I’‘ve just finished a first stab at a packet filter plugin. Currently the plugin allows you to create rules by defining a source, destination and packet type (iq,pressence,message). Based on the criteria you assign an action (drop,reject,pass). The first rule that matches gets executed. I’'ve taken some screen shots and uploaded them here :
If anybody is interested in trying this plugin out or would like some more info, shoot me a pm and I will help you out.