DDNS with IPv6
My ISP provides /64 IPv6 block but it's a not a static block, so it's really annoying when I trying to access my home server (yes, it's a raspberry pi) remotely as allocated IPv6 prefix block changes time to time. here's my solution for that Getting the current IP #!/bin/sh if [ -z "$1" ] then echo "usage : ./$0 <iface>" else ip -o -6 addr show $1 | sed -e 's/^.*inet6 \([^ ]\+\).*/\1/' | grep '/128' | awk -F '/' '{print $1}' fi I am using freedns.afraid.org as my DDNS provider (it's free), this is my script to run as a cron job to update latest IPv6 address #!/bin/sh ip6_addr=`./get-addr-dialog-bb.sh eth0` # last_ip6_addr=`cat ./.last_ip6_addr 2> /dev/null` host=`hostname -f` auth='<user>:<password>' # freedns.afraid.org credentails if [ "$ip6_addr" != "$last_ip6_addr" ] then curl -k "https://freedns.afraid.org/nic/update?hostname=$host&a