Can openwrt update IPv6 prefix automatically?

Integration in devices/software
#1

Now I have to manually update it. Does somebody know how to set it up in OpenWrt?

#2

Yes, it is possible. The API docs say that the prefix is updated if there is a “/64” at the end of the submitted IPv6 address when using the /api/update API, and OpenWRT “dynv6” template does not do this. So you have to switch to the custom template.

Here is what I have in /etc/config/ddns, and it works:

config service 'dynv6_ipv6'
	option use_ipv6 '1'
	option enabled '1'
	option lookup_host '<MYZONE>.dynv6.net'
	option domain '<MYZONE>.dynv6.net'
	option password '<MYKEY>'
	option use_https '1'
	option interface 'lan'
	option ip_source 'network'
	option ip_network 'lan'
	option force_interval '1'
	option update_url 'https://dynv6.com/api/update?hostname=[DOMAIN]&token=[PASSWORD]&ipv6=[IP]/64'

Please substitute <MYZONE> and <MYKEY> with your own values, but do not modify the update_url line, it is supposed to contain placeholders exactly in this form.