I need to setup dynamic ddns on the latest openwrt trunk version.
On previous versions I used customized dynamic_dns_updater.sh, but in the modern versions functionality seem to be builtin.
/usr/lib/ddns/update_nsupdate.sh script seems correct one.
But there's bug in luci so I cannot save any ddns entry.
I have to create /etc/config/ddns myself.

Can you pls give me an example of correct ddns configuration for nsupdate ?

I have keyfile that looks like :

key "some.domain.com" {
        algorithm hmac-sha256;
        secret "..........................E=";
};

(Last edited by bolvan on 9 Jan 2016, 14:23)

Hi,
I'm very sorry but I never got feedback on "nsupdate" script. So I can't test.
Do you have your old customized script ? If yes could you please mail me directly so I can have a look on it.
Thanks
Christian

Finally I've discovered how to use builtin script.

/etc/config/ddns :

config service 'testupdate_dyn_domain_com'
    option domain 'testupdate.dyn.domain.com'
    option dns_server 'ns1.domain.com'
    option ip_source 'network'
    option interface 'wan'
    option ip_network 'wan'
    option use_syslog '2'
    option use_logfile '1'
    option enabled '1'
    option update_script '/usr/lib/ddns/update_nsupdate.sh'
    option username 'hmac-sha256:testupdate.dyn.domain.com'
    option password '...................fB0='
    option check_interval '1'
    option check_unit 'hours'

keyfile :

key "testupdate.dyn.domain.com" {
        algorithm hmac-sha256;
        secret "...................fB0=";
};

To test run  '/usr/lib/ddns/dynamic_dns_updater.sh testupdate_dyn_domain_com'

Make sure the following packages are installed : bind-libs bind-client bind-tools
On the server side I run bind9 with specially configured zones with dynamic updates enabled.

(Last edited by bolvan on 10 Jan 2016, 14:04)

This thread is quite old but it is still accurate

On LEDE 17.01.4
I had hard time understanding the username option

The username must be set to the key name known by bind as in

key "BindKeyName" {
        algorithm hmac-md5;
        secret "QJc08cnP1xkoF4a/eSZZbw==";
};

the first part is optionnal if the algorithm is the default for nsupdate so the option in /etc/config/ddns should look like

option username [alg]:BindKeyName

(Last edited by guym on 10 Nov 2017, 14:03)