Seeking advice for back-up internet connection at home

JCPhoenix
2025-08-18T00:59:46Z

Hello, Tildes Tech Support Team,

I'm doing some Homelab stuff. And I'm looking for a way to set up an inexpensive back-up Internet connection. Less about having a connection when I'm home and Internet goes out (Phone hotspot works in a pinch), but more about getting in and getting statuses of stuff when I'm not home and Internet drops.

For background, I have a Ubiquiti Unifi Dream Machine Pro that can do WAN failover. My primary Internet connection is through Verizon Fios. The UDM and the Fios ONT are directly connected via ethernet; I'm not using Verizon's crappy home router. Also, I rarely lose Internet connectivity. This really is just a Homelab experiment to see if it can be done.

I've seen some stuff about getting a cheap, refurb smartphone and a cheap MVNO plan like Google Fi that nets me a handful of GB a month, and then tethering the UDM to the phone somehow (maybe through some cheap router in bridge/passthrough mode like a GLinet travel router). Has anyone had any experience doing this?

But...I actually have a secondary Internet connection already. My apartment complex has WiFi across the complex and for each unit. That I unfortunately have to pay for, even though I don't use it -- I want FULL control over my home network. But since I do have it, is there a way I can take advantage of this? I'm thinking something like a reverse AP, if that exists. But it has to pass through the IP from the apartment WiFi.

I know there will likely be issues with double NATing. But depending on the services/things I'm trying to access or keep access to, that may not be a factor. Like my Unifi hardware talking with the Unifi cloud access stuff. I think double NAT shouldn't matter.

Anyway, appreciate whatever you all got!

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