Linux IPv6 HOWTO (en)
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Chapter 16. Firewalling

Table of Contents
16.1. Firewalling using netfilter6
16.2. Preparation
16.2.1. Get sources
16.2.2. Extract sources
16.2.3. Apply latest iptables/IPv6-related patches to kernel source
16.2.4. Configure, build and install new kernel
16.2.5. Rebuild and install binaries of iptables
16.3. Usage
16.3.1. Check for support
16.3.2. Learn how to use ip6tables
16.3.3. Demonstration example

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 Automatic Private IP Addressing (APIPA)Google search for Microsoft + APIPA, in IPv6 normally global addresses are used and someone with IPv6 connectivity can reach all internal IPv6 enabled nodes.

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Mobility Firewalling using netfilter6

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