Spider Jerusalem

This was years ago - but I feel like the solution for CGNAT at the time required a static, and we also implemented DDNS for their TLD. It definitely wasn’t T-Mobile. It took some time to find someone at the mobile ISP who understood what we needed, and what options existed.

If you don’t have specific application support needs, Debian based distros like Ubuntu/Mint (based on Ubuntu) are good for a first-timer. You won’t have all the GUI management stuff like you get in Windows. You may find Arch a bit more challenging.

ISP may offer a static IP, and/or help bypassing CGNAT if either are useful. I’ve done it for a 5G failover with VPN, with the gateway in passthru, and a firewall behind it. At a glance, it looks like the FX4100 supports all of this

I’ve used APs to mesh (5ghz) two buildings together, with a switch on the far side of the arrangement as a bandaid prior to cabling work. APs and switch in the bridged building were managed, minimal load, worked well enough. I’ve also had good luck with UBBs, though these were always mounted outdoors, and at 1km or less. PoE in both examples. Other parts of the networks in all cases were a mishmash of different vendors.

I wouldn’t expect the meshed APs to care about what’s on the other side of them, either, but haven’t tried with unmanaged devices/different vendors. I also wouldn’t expect high performance from 5ghz meshing, but depends on several factors. UBBs definitely don’t care what’s behind them.