5 docs tagged with "firewalls"

The iptables command can be broken into multiple pieces:

Filter Table

A firewall is a network security system that monitors and controls network traffic. It applies to bot incoming and outgoing traffic. Can be implemented on HW and/or SW.

netfilter is a packet-filtering framework built into the Linux kernel. To better understand netfilter, we need to start with some vocabulary:

The TCP Wrappers system is a host-based network firewall and ACL. Originally, it only protected the inetd system, but has now been extended with the shared object library libwrap.