Internet Recovery fails via Ethernet but succeeds via WiFi

I believe at least the order of use & the DNS matter or are of use i Recovery mode... DNS settings are per Interface, or in the Modem itself sometimes, also per Interface sometimes, meaning Wifi could have DNS Settings bur Ethernet could be blank DNS wise.

Oh, almost forgot, how to set DS inRecovery mode...

https://apple.stackexchange.com/questions/324584/how-to-change-nameserver-in-resolv-conf-in-recovery-mode

You can use scutil interactively from the terminal. Run sudo scutil and run these commands, swapping your DNS servers in where appropriate:

> open
> d.init
> d.add ServerAddresses * 8.8.8.8 9.9.9.9
> set State:/Network/Service/PRIMARY_SERVICE_ID/DNS
> quit

https://superuser.com/questions/86184/change-dns-server-from-terminal-or-script-on-mac-os-x

Hey there Matti, see if any of this applies...

In Ventura & up, exchange Sys Settings for Sys Prefs...

Convert the following System Preferences to System Settings...

Make a New Location, Using network locations in Mac OS X ...

System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.

System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.

The interface that connects to the Internet should be dragged to the top of the list.

Sys Prefs>Network>highlight the Interface you're using>Advanced>TCP/IP>Configure IPv4: Using DHCP.

If using Wifi, instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.

System Preferences>Network>choose interface>Advanced>Proxies Tab, make sure none are set, like for HTTP & HTTPS.

System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...

8.8.8.8

8.8.4.4

1.1.1.1

9.9.9.9

Apply.