Configuring GL.iNet Router using DuckDns

Installing and Using OpenWrt Network and Wireless Configuration
1

I am trying to configure my router to dynamically update its IP using duckdns. The router is GL-AR300M-ext and the OpenWrt firmware version is v3.024. My router gets internet using a USB modem via tethering. Internet works fine.

Following the instructions on duckdns, whenever I run /usr/lib/ddns/dynamic_dns_updater.sh duckdns to test my script, I get an dynamic_dns_updater.sh: unknown command - duckdns error.

The content of my /etc/config/ddns file is:

config service "duckdns"
        option enabled          "1"
        option domain           "subdomain.duckdns .org"
        option username         "username"
        option password         "password"
        option ip_source        "network"
        option ip_network       "tethering"
        option force_interval   "72"
        option force_unit       "hours"
        option check_interval   "10"
        option check_unit       "minutes"
        option update_url       "http://www.duckdns.org/update?domains=[USERNAME]&token=[PASSWORD]&ip=[IP]"

I can see that the IP is not being updated whenever I check duckdns. I'll appreciate any pointers to put me on the right direction. Thanks.

2

If the DDNS feature is consistent with OpenWrt 18.06.1, to which the GL.iNet firmware adds many "convenience" packages, then it should configure the same way as described at https://openwrt.org/docs/guide-user/services/ddns/client

It looks similar, so perhaps someone here can help.

Another place to check is with the GL.iNet forums, especially if GL.iNet has a special package for DDNS.