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+====== IPv6 ======
+===== SixXS =====
+  * Handle: BRR3-SIXXS
+===== Setting up the gateway =====
+Add the following to the network configuration:
+{{File|/etc/conf.d/net|<syntax lang="gentoo-conf-d">
+config_br0="2a01:348:1b6:0::1/64"
+config_br1="2a01:348:1b6:1::1/64"
+depend_sixxs() {
+    need net.br0
+}
+iptunnel_sixxs="mode sit remote 77.75.104.126 local 78.86.202.93 ttl 64 dev br0"
+mtu_sixxs="1280"
+config_sixxs="2a01:348:6:1d4::2/64"
+routes_sixxs="2000::/3 via 2a01:348:6:1d4::1"
+</syntax>}}
+Create an init script for the sixxs tunnel, start it, and have it run on boot:
+{{Root|<source lang="bash">
+cd /etc/init.d
+ln -s net.lo net.sixxs
+/etc/init.d/net.sixxs start
+rc-update add net.sixxs default
+</source>}}
+==== Firewall ====
+Iptables only works on IPv4, so we will also need an IPv6 firewall, which is handled by <tt>ip6tables</tt> (installed with the {{Package|direct=yes|net-firewall/iptables}} package, when the {{USEFlag|{{EnableFlag|ipv6}}}} USE flag is enabled).
+Create an empty ruleset with:
+{{Root|<source lang="bash">
+ip6tables-save > ip6tables.sixxs
+</source>}}
+Edit the file, and then run the following commands to install the rules, and ensure the firewall starts up on boot:
+{{Root|<source lang="bash">
+iptables-restore ip6tables.sixxs
+/etc/init.d/ip6tables save
+/etc/init.d/ip6tables start
+rc-update add ip6tables default
+</source>}}
+==== Router Advertisements ====
+Install the Router Advertisement Daemon, which announces the subnet prefix for local machines to use when using stateless autoconfiguration:
+  * {{Package|direct=yes|net-misc/radvd}}
+Set up <tt>radvd.conf</tt> with the local configuration:
+{{File|/etc/radvd.conf|<syntax lang="conf">
+interface br0 {
+    AdvSendAdvert off;
+};
+interface br1 {
+    AdvSendAdvert on;
+    AdvLinkMTU 1280;
+    MaxRtrAdvInterval 300;
+    prefix 2a01:348:1b6:1::/64 {
+        AdvOnLink on;
+        AdvAutonomous on;
+    };
+};
+#interface eth3 {
+  -   AdvSendAdvert on;
+  -   AdvLinkMTU 1280;
+  -   MaxRtrAdvInterval 300;
+#
+  -   prefix 2a01:348:1b6:2::/64 {
+  -       AdvOnLink on;
+  -       AdvAutonomous on;
+  -   };
+#};
+</syntax>}}
+Then start the service, and ensure it is stared on every boot:
+{{Root|<source lang="bash">
+/etc/init.d/radvd start
+rc-update add radvd default
+</source>}}