I finally solved my VPN issue. I don't entirely understand it, I am not a networking guy. The default MTU of 1420 was apparently too big. I don't know if this is something with my ISP or something...

@Clive_A Thanks for the reply. I was trying to describe that I cannot get anything to completely load. With piHole as the example, it works from a name from within my network. But via the VPN, I...

@d0ugmac1 ++1 for keeping OpenAPI and radius around!

Well that was an unpleasant experience! There was nothing in the release notes about deprecating the OpenAPI. I depend on this as a workaround to get DNS resolution of local hosts. The only...

@brianc1969 Without my changing anything, ssh has stopped working... it partially loads the welcome message from the server, but never actually gives me a shell prompt... and it just sits there...

So I followed the guide here: https://www.reddit.com/r/TPLink_Omada/comments/16tj25p/wireguard_vpn_on_er605_v2_with_omada_a/ I successfully set up a wireguard vpn that my laptop (kubuntu) can connect...