Hi, I am just wondering how to test the SPI (stateful packet inspection) in software / hardware firewalls. Is there a web service / application. Or do I have to use WinPCap or Ethereal - In that case how do I craft the special network packets to send out? Obviously it would be good to differentiate between basic SPI, advanced SPI and normal packet filtering. See here for an example. Thanks Phant0m!