Hi.. > I need to clarify this. Is iptables(user space tool) puts hook into > the netfilter framework? I don't really check the code, but I believe yes. Depends on what you put as parameters when calling iptables, that could range from simply checking dest/source address, checking the payload and so on. The hook itself is put in the required spot, i.e INPUT will go to NF_INPUT (or something like that, I forgot the name). regards, Mulyadi -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ