Chapter 14. Firewalling and security issues

Table of Contents
14.1. Firewalling
14.1.1. Firewalling using netfilter6
14.1.2. Preparation
14.1.3. Usage
14.2. Security
14.2.1. Node security
14.2.2. Access limitations

IPv6 firewalling is important, especially if using IPv6 on internal networks with global IPv6 addresses. Because unlike at IPv4 networks where in common internal hosts are protected automatically using private IPv4 addresses like RFC 1918 / Address Allocation for Private Internets or APIPA / Automatic Private IP Addressing, in IPv6 normally global addresses are used and someone with IPv6 connectivity can reach all internal IPv6 enabled nodes.