It took me a bit to get this going so i thought i would share. When you are done you will have IPv6 in your home for all your devices.

High level instructions
1. sign up for a (free!) tunnel account @ http://tunnelbroker.net/
2. change your DDNS settings in asuswrt to reset your v4 IP if it changes
3. Setup a ipv6 6in4 tunnel
4. put an ip6tables firewall script on
5. run the test @ http://test-ipv6.com/ and enjoy!

OK, some details.
I assume you can all do #1 without trouble.

For #2, On your asuswrt interface, go to WAN/DDNS. Select the 'www.tunnelbroker.net' provider. In the 'Host Name' put the tunnel ID your tunnel has. This is a ~5 digit number, and appears on your 'Tunnel Details' page on the tunnelbroker.net website after you have logged in. In the "User Name or Email Address" put your user-id which is a really long alphanumeric string for User ID that you will see if you click on "Main Page" (just above account info) on the tunnelbroker.net site. Then enter your password. Once this is done, the DDNS client on the router will update HE each time your IP changes.

For #3, select 'IPV6' on the asuswrt interface. Select 'Tunnel 6in4' for connection type. Enter the Server IPv4 Address from your HE tunnel details page. Enter the Client IPv6 address (without the mask... this should end in ::2). Select 64 for ipv6 prefix len. Select 1480 for Tunnel MTU. Select 255 for Tunnel TTL. In the IPv6 lan settings, take the value from the 'Routed /64' on your tunnel details page, and enter it as LAN ipv6 prefix. Do not put the mask, but end in :: (e.g. X:X:X:X:. Enter 64 for the prefix len. In the IPv6 DNS resolvers, put 2001:470:20::2, 2001:4860:4860::8888, and 2001:4860:4860::8844. Now select 'Enable Router Advertisement'.

@ this stage you should have ipv6 connectivity, you can check that here: http://test-ipv6.com/, or run 'ifconfig' on your linux machine, or ipconfig on your windows machine. These should have gotten an ipv6 from the router via router advertisement. If not, debug until you do.

For #4, you are going to want to do some firewalling I think (If you are happy with all your interior machines open on the internet, skip). Go to the administration/System tab, enable JFFS. Now create a file called /jffs/scripts/firewall-start [i did this via SSH] based on the attachment to this thread. You need to change the top 3 lines to match your tunnel IP interfaces.

This will allow any machine inside your house to do what it wants, but disallows incoming connectivity.

At this stage, re-run the ipv6 test http://test-ipv6.com/, and you should be good to go.

You may wish to remove the bottom 3 lines of the script (the LOG) ones, they are for debugging, but cost a lot of perf.

 修改MAC地址时，一定要在纯DOS环境下修改。目前使用U盘DOS引导盘来刷新BIOS及重写MAC地址是最方便的。只要U盘可DOS引导，就可在启动时选择USB设备引导来重写MAC地址（或刷新BIOS）。
   一、主板使用AMI BIOS的只要使用AMI的BIOS刷新工具重写网卡的MAC地址就可以。AFUDOS下载地址：http://ftp.biostar.cn/upload/Driver/Other/AFUDOS.rar 在DOS环境下，运行AFUDOS /M XXXXXXXXXXXX（其中XXXXXXXXXXXX为集成网卡的12位MAC地址。如：AFUDOS /M 00E04D9C6D83）
   二、针对使用RTL8111C网卡的请使用另一工具刷回MAC地址。工具下载地址：http://ftp.biostar.cn/upload/Driver/Other/MAC-8111C.rar 该工具DOS下命令为：PG8168 /nodeid XXXXXXXXXXXX（其中XXXXXXXXXXXX为集成网卡的12位MAC地址。如：PG8168 /nodeid 00E04D9C6D83）RTL8111DL 需要加下面参数：DOS输入PG8168 /EFUSE RTL8102EL 网卡刷新工具：http://ftp.biostar.cn/upload/driver/FAQ/RSET8136.105.zip 该工具DOS下命令为：PG8136 /efuse
   三、使用Marvell网卡的MAC地址刷回需使用marvell的专用工具，工具下载地址：http://ftp.biostar.cn/upload/Driver/Other/yukonvpd.rar DOS命令为：yukonvpd -M XXXXXXXXXXXX（其中XXXXXXXXXXXX为集成网卡的12位MAC地址。-M必须要大写的M，不可用小写的-m。如：yukonvpd -M 00E04D9C6D83）
   四、AWD BIOS刷新MAC地址请参考“映泰Award类型主板BIOS怎样刷新？”：http://www.biostar.cn/app/en-us/support/faq.php?S_ID=1
   五、NV系列主板的软网卡还可利用刷新BIOS的方式刷写MAC地址 命令如下：A:awdflash xxxx.xxx /PY/SN /NVMAC:XXXXXXXXXXXX/WB

 CG到CS这个地方已经有一个月的时间了，CS这里的学校跟YC学校上网方式有所不同因而很伤脑筋，主要是这里学习的网络是分配给每个人一个私有IP，但是这个IP是跟你的MAC地址绑定的，而且又与你的网络接入口绑定的，所以，如果有两台电脑上网，或者想更换端口是件很麻烦的事，CG最近就利用了Realtek瑞昱提供的网卡MAC地址修改工具强制修改了自己的网卡MAC地址。



首先大家得要找到自己网卡芯片对应的MAC刷新程序，大家可以Google一下，因为CG网卡是最常用的Realtek螃蟹的8168，所以可以很快找到，另外RT的8168和8111B的刷新程序是相同的，所以8111B的朋友可用8168来刷，这里CG提供8168/8111B/8169打包给大家下载



MAC地址修改工具下载地址（来源于Realtek技术论坛）：

http://www.lidaren.com/code/816xmac.zip





具体操作有点麻烦，需要进入纯Dos环境下才可以进行，PE也是不行的，PE下即使成功也可让你的网卡mac全部是F或全0。下面是过程



第一步：进入windows下的设备管理器，然后选中你要修改MAC的网卡，选择卸载，这一步很重要，因为修改MAC后，windows会认为你插入了新的网卡，但是原来网卡的配置依然在操作系统中保存，会导致刷新失败或网卡冲突，所以大家一定要先卸载掉原来的网卡。



第二部：在Windows下配置好你要修改的MAC地址，用记事本打开在刷新程序所在的目录下的同名[.cfg]文件，然后找到第一行的[NODEID = 00 E0 6F 00 00 00],将这行的后三对16进制数修改任意的16进制数即可，注意这里用大写，前面三位因为设计厂商和保留地址的问题，建议大家不要修改，修改的话可能导致Realtek网卡无法识别而失败，另外下面的相关输入，一般大家不要做任何修改，非专业人士慎用！！



第三步：将所有的文件拷贝到DOS有效的目录下，最好是根目录或者大家可以再DOS下可以找到的目录下，中文目录的会导致无法打开的问题



第四步：进入纯DOS环境下，运行8168.exe或8169.exe即可，修改MAC使用 /w 参数8169.exe会自动读取8169.cfg下的配置信息并写入EEROM中，也可以8169.exe /w XXX.cfg 写入指定的MAC数据，等待几秒，看到Programming EEPROM is successful之后就说明成功，然后重新启动即可。



另：高级用户可直接使用8169.exe /nodeid 00E06FXXXXXX 直接完成MAC的修改

安装脚本：
wget --no-check-certificate https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocks.sh
chmod +x shadowsocks.sh
./shadowsocks.sh 2>&1 | tee shadowsocks.log