My carrier started blocking requests from my tethered computer if they are made through a VPN ... that doesn't seem like it obviously fits into any category? Any guesses as to how they can do that?
Time to start blocking their requests to your bank account.
As to why they’re doing that I have no idea, I guess they want to see your traffic in the clear and so block most VPN protocols (though you should be able to get a TLS-based VPN working over port 443 as it’ll look like standard HTTPS).
