Hi there,
Please see below the article to set up a D-Link router for Openserve using a PPPoE connection.
I know you are using a Netgear router however the settings will be the same only the layout of the device's interface may be different.
This first thing you need to do is log into your Netgear router via the IP address, you will find this under your router.. -https://help.afrihost.com/topic/home-network/how-to-log-into-a-router
How to set up your Fibre router (Openserve) - https://help.afrihost.com/topic/fibre-broadband/how-to-set-up-your-fibre-router
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