双栈网络配置路由器的ipv6穿透

本教程测试过程基于Newifi Y2路由器，系统为PandoraBox，理论上 OpenWrt原生同样适用。

1.修改路由器的软件源

dest root /
dest ram /tmp
lists_dir ext /var/opkg-lists
option overlay_root /overlay
src/gz 14.09_base http://downloads.openwrt.org.cn/PandoraBox/ralink/packages/base
src/gz 14.09_telephony http://downloads.openwrt.org/chaos_calmer/15.05/ramips/mt7620/packages/telephony
src/gz 14.09_packages http://downloads.openwrt.org/chaos_calmer/15.05/ramips/mt7620/packages/packages
src/gz 14.09_routing http://downloads.openwrt.org/chaos_calmer/15.05/ramips/mt7620/packages/routing
src/gz 14.09_management http://downloads.openwrt.org/chaos_calmer/15.05/ramips/mt7620/packages/management
arch ralink 1
arch all 2
arch ramips_24kec 3

注:软件源由于硬件配置不同的会有所区别，Newifi是MT7620方案，其他芯片方案的请移步以下两个网址自行匹配：

OpenWrt中文网址 http://downloads.openwrt.org.cn/
OpenWrt download area https://downloads.openwrt.org/

2.配置Odhcpd

• 软件包中更新并安装最新版本的odhcpd
• 修改dhcp文件（文件路径：/etc/config/dhcp，不熟悉ssh的可以使用winscp修改)

config dnsmasq
	option domainneeded '1'
	option boguspriv '1'
	option filterwin2k '0'
	option localise_queries '1'
	option rebind_protection '1'
	option rebind_localhost '1'
	option local '/lan/'
	option domain 'lan'
	option expandhosts '1'
	option nonegcache '0'
	option authoritative '1'
	option readethers '1'
	option leasefile '/tmp/dhcp.leases'
	option resolvfile '/tmp/resolv.conf.auto'
	option localservice '1'

config dhcp 'lan'
	option interface 'lan'
	option start '100'
	option limit '150'
	option leasetime '12h'
	option dhcpv6 'hybrid'
	option ra 'hybrid'
	option ndp 'hybrid'
	option ra_management '1'

config dhcp 'wan'
	option interface 'wan'
	option ignore '1'

config odhcpd 'odhcpd'
	option maindhcp '0'
	option leasefile '/tmp/hosts/odhcpd'
	option leasetrigger '/usr/sbin/odhcpd-update'

config dhcp 'wan6'
	option interface 'wan'
	option dhcpv6 'hybrid'
	option ra 'hybrid'
	option ndp 'hybrid'
	option master '1'

修改后保存并重启路由器即可。

3.后话

配置后好像dns出了一些问题，在访问其他校内以.byr.cn或.bupt.edu.cn为后缀的网址显示dns错误，如果有大牛解决了这个DNS问题，可以分享一下思路。

2018.9.9更新：后话所述问题已经解决