Worth Reading: IPv4 route lookup on Linux During the lifetime of an IPv4 datagram inside the Linux kernel, one important step is the route lookup for the destination address through the fib_lookup() function. From essential information about the datagram (source and destination IP addresses, interfaces, firewall mark, …), this function should quickly provide a decision. —Vincent Bernat @MTU Ninja Related ← Worth Reading: DNS Hijacking is RealWorth Reading: Crafted DDoS →