通过IPV6从外网访问家里的NAS需要做两件事：一是解决IPV6的DDNS，二是配置路由器的防火墙。
先说DDNS，我用的是群晖的NAS，动态域名用的是Dnspod，但是群晖NAS自带的DDNS不支持Dnspod的IPV6更新。
只能自己写脚本来解决这个问题，直接上代码：
【以下代码在群晖DSM6系统下测试正常，其他设备可能需要做修改】
#!/bin/bash
#Dnspod DDNS6 with BashShell
#改编自Github:https://github.com/kkkgo/dnspod-ddns-with-bashshell
#CONF START
#API_ID和API_Token在dnspod的控制台 -> 用户中心 -> 安全设置 -> API Token 中获取
API_ID="12345"
API_Token="abcdef123456abcdef123456abcdef123456"
domain="yourdomain.com"
host="yourhost"
DEV="eth0"
#CONF END
date
IPREX="((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))"
DEVIP=$(ip -6 addr list scope global $DEV | grep -v " fd" | grep inet6 | awk '{print $2}' | head -n 1)
if (echo $DEVIP | grep -qEvo "$IPREX");then
echo "Get $DEV inet6 IP Failed."
exit
else DEVIP=$(echo $DEVIP | grep -Eo "$IPREX" | head -n 1)
fi
echo "[DEV IP]:$DEVIP"
DNSTEST=$(nslookup -q=AAAA $host.$domain)
if (echo $DNSTEST | grep -qEvo "$IPREX");then
echo "Get $host.$domain DNS Failed."
exit
else DNSIP=$(echo $DNSTEST | grep -Eo "$IPREX" | tail -n 1)
fi
echo "[DNS IP]:$DNSIP"
if [ "$DNSIP" == "$DEVIP" ];then
echo "IP SAME IN DNS,SKIP UPDATE."
exit
fi
token="login_token=${API_ID},${API_Token}&format=json&domain=${domain}&sub_domain=${host}"
Record=$(curl -s -k -X POST https://dnsapi.cn/Record.List -d "${token}")
iferr=$(echo ${Record#*code} | cut -d'"' -f3)
if [ "$iferr" == "1" ];then
record_ip=$(echo ${Record#*value} | cut -d'"' -f3)
echo "[API IP]:$record_ip"
if [ "$record_ip" == "$DEVIP" ];then
echo "IP SAME IN API,SKIP UPDATE."
exit
fi
record_id=$(echo ${Record#*\"records\"\:\[\{\"id\"} | cut -d'"' -f2)
record_line_id=$(echo ${Record#*line_id} | cut -d'"' -f3)
echo Start DDNS update...
ddns=$(curl -s -k -X POST https://dnsapi.cn/Record.Modify -d "${token}&record_id=${record_id}&record_line_id=${record_line_id}&value=${DEVIP}&record_type=AAAA")
ddns_result="$(echo ${ddns#*message\"} | cut -d'"' -f2)"
echo -n "DDNS upadte result:$ddns_result "
echo $ddns | grep -Eo "$IPREX" | tail -n 1
else echo -n Get $host.$domain error :
echo $(echo ${Record#*message\"}) | cut -d'"' -f2
fi将以上代码保存为.sh文件，然后在NAS系统里添加一个计划任务：
More...
