Linux IPv6 HOWTO (en)
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Chapter 17. Firewalling

Table of Contents

17.1. Firewalling using netfilter6

17.2. Preparation

17.2.1. Get sources
17.2.2. Extract sources
17.2.3. Apply latest iptables/IPv6-related patches to kernel source
17.2.4. Configure, build and install new kernel
17.2.5. Rebuild and install binaries of iptables

17.3. Usage

17.3.1. Check for support
17.3.2. Learn how to use ip6tables
17.3.3. 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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Common information		Firewalling using netfilter6