Hello. I hope you can understand my english and what I am asking for. I read that Windows Firewall have SPI and also that Ghostwall is superior to Windows XP firewall. So I will like to know if Ghostwall is filtering traffic using some kind of SPI. The simple basic understanding of SPI is to me that with Stateful Packet Inspection (SPI), every time a packet is sent out of the computer, the firewall keeps track of it. When a packet comes back to the firewall, the firewall can tell whether or not the inbound packet is a reply to the packet that was sent out. If not by SPI then how Ghostwall is deciding what to allow inbound with only one rule allow all out and no rules for incoming? Second and last rule block all that not match rule above. I understand that somehow inbound is allowed based on outbound so that indicates some TCP packet filtering and remembering the request for communication and that would fit to SPI maybe? Also Ghostwall is closing not used ports, what again indicates for SPI work. Here are some key features of "GhostWall": · Packet filtering ability for TCP/UDP/RAW and ICMP. · 64-bit and 32-bit compatible · Suitable firewall for people who play games and other low latency requirements · Very Low resource usage · Minimal impact to network latency due to fast and efficient coding · Shows network speed for TCP/UDP/RAW and ICMP · Shows data transfered for TCP/UDP/RAW and ICMP · Displays 50 last blocked and allowed packets for TCP/UDP/RAW and ICMP · Panic buttons, to allow all traffic, or to block all traffic What exactly the first point mean? I just try to understand... and I like Ghostwall so far because is easy, fast and light - but I will like to know more about it. I am also using CHX-I so I am wondering if Ghostwall is achieving its goals in allowing income in similar way? I will really appreciate the answer.