Disconnected from server

Hi there.
I'm getting disconnected from server every 30sec more or less, I have removed all addons and I don't know what to do next, is there anything I can do, so I don't get diconnected?
I'm getting disconnected from server every 30sec more or less, I have removed all addons and I don't know what to do next, is there anything I can do, so I don't get diconnected?