The Huawei B315 modem supplied by Optus for the (now defunt) Vividwireless service is a workable but sadly rather crippled device, even down to the inability to modify assigned DNS servers from it's DHCP server away from Optus DNS to something sane (Google DNS/Cloudflare/etc.).
This script should allow for the easy update of assigned DNS servers and has been tested with Google Chrome.
- Log into router web UI (e.g.
http://192.168.0.1
). - From the same browser session, open the "web developer tools" pane.