I have a server running in my home, it only runs deluged and a vpn server. Sometimes it just becomes unavailable and i have no idea why. I log the temperature every 15 minutes and it is logging while i cant reach it, but it seems like it has no internet acces. Usually it takes a couple of hours, but it works after that. Now it went offline around 3pm and came back around 11 pm, but after a few minutes it went offline again. When its online the router can see it, but it cant see it while offline. Restarting the router doesnt help. Any idea what could be the problem or what should i check?