Not necessarily time for a new host. I have been having a similar problem with MDDhosting for over a month now (lost track). They say it is due to repeated attempts to connect with the wrong password that resembles a DOS attack so my IP gets blocked. My website is still available, but I can not connect from my come computer or upload new data until the site is unblocked. MDDhosting says it will automatically unblock once the “attack” stops for a couple minutes or something like that, but since WD keeps trying to connect it never stops. I can log onto my billing account and manually unblock it, but the frequency has gone from occasional to every few hours.
I think this has something to do with the push to secure connections, but I just know enough to be dangerous.;