If by RJ45 you mean erhernet over standard 8P8C (i.e. RJ45) your looking for SFP-T modules. Can’t connect that to your DSL line though since that’s not Ethernet.

There do seem to exist G.fast sfp modules for dsl, but do note that sadly sfp module and router brand incompatibility is sadly a thing.

Related note: At our company we also had quite some issues getting some of these more special sfp modules working (e.g. XGS-PON), so ymmv with a dsl one.

(If you’re looking for a device to plug sfp modules into, I can second MikroTik here. They’re also great about accepting 3rd party SFPs)

If your dsl is G.Fast you could try the Zyxel GM4100. That device is only a bridge

No I’m talking about VMs. It’s the baloon kernel driver which also works on Windows (though needs separate installation). It doesn’t work quite like containers though. The hypervisor dynamically adds/removes memory to the VM depending on total memory usage of the hypervisor.

See https://pve02.northcode.ch:8006/pve-docs/chapter-qm.html#qm_memory

Nowadays you can also assign a dynamic amount of memory. I’ve only ever used this with Linux VMs on Proxmox though, but I’m pretty sure it works with Windows as well

What do you mean by expensive? It’s free open source software no?

That doesn’t match my experience with AUR at all. Usually it pulls a specific git revision and checks the hash. This also ensures that the build shouldn’t suddenly fail to some extent.

Though it’s entirely possible that it’s not like this for all packages, though I find it kind of counterintuitive since your package manager wouldn’t know when to perform an update in this case.

A diagram of the relevant Hypervisor/VMs/containers + Network information would be helpful.

From where and how are you testing DNS? Did you use dig and specified the nameserver directly?