We are experiencing time outs when on our own remote server. We build and host websites. But I think I have pinpointed why. We use Avast virus/firewall and have for 10 years or so, however, since the last update (17.3.2291 - Build 17.3.3443.0) we have had this problem. When I use another computer in the building that has not had the latest upgrade (17.2.2288 Build 17.2.3419.64) the server works fine without interruption. Also, when I disable Avast, both here and at home, I am able to work without issues.
It seems that after I am on the server and in WordPress and go into an area that allows uploads, the server times out - even email does not work. Eventually, the connection returns, only to repeat the time out. So there must be some setting either on the server or within Avast that causes the problem.