1. Why do we need to build a kernel module in order to use the netfilter hooks?
2. Based on the netfilter diagram below, please describe which filter is best for enforcing the following rules:
(a) Restricting what comes into a computer
(b) Restricting what goes out of a computer
3. Does a SYN flooding attack cause the victim server to freeze?
NF_IP_PRE_ROUTING Routing Routing NF_IP_FORWARD NF_IP_POST_ROUTING Routing Network Stack NE_IP_LOCAL_IN REJO LOCAL MI L N NE_IP_LOCAL_OUT EJO LOCAL,OUT