|Updates have nothing to do with the issue. What are the messages BEFORE the update failure? The update failure indicates a connection failure so its a result not the originator of the problem.|
Next time before you reboot the server do the following;
Post the results of these commands for review and further troubleshooting suggestions.
You would want to do these commands from the server when its not reachable and from the outside. Between the two it should be evident where the break in communication is.
Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's