Closed "Join failed - Error connecting"

EDIT: The server started working by itself. If a moderator wants to lock this thread, feel free to do so.

Hi. I rented a server for me and my girlfriend to play on, since neither of us can open ports. We've played on the server for a couple of days now, but suddenly the server threw us out and now shows the standard "Join failed - Error connecting to xxx.xxx.xxx.xxx" error.

The log had this to say about when it gave me the boot:

Code:

Info: UniverseServer: Kicking client 'Derkaderk' <1> (*IP REDACTED*) due to inactivity
Info: UniverseServer: Shutting down ship world for client 'Derkaderk' <1> (*IP REDACTED*)
Info: UniverseServer: Client 'Derkaderk' <1> (*IP REDACTED*) disconnected
Warn: I/O error from *IP REDACTED* in NetSocket read loop or device closed: NetworkException: tcp recv error: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.


  TcpSocket::readPartial(char*, unsigned int)
  IODevice::readFull(char*, unsigned int)
  NetSocket::readerLoop()
  ThreadImpl::runThread(void*)
  BaseThreadInitThunk
  RtlInitializeExceptionChain
  RtlInitializeExceptionChain

We've tried waiting (yesterday it kicked us out because of lag, and let us back in later), patching it, and I tried restarting it several times now. Any clue as to why this is happening and how to fix it?