"permission denied" on wake-up

[David McKeegan <monitor@xxxxxxxxxxxxxxxxxxxxxx>]

Tor newbie here.

I set my relay (running on an Ubuntu VPS) to hibernate after 2GB and  
everything seemed to be working fine until the time came for it to  
wake up for the first time. My log showed this repeated error:

Jul 14 14:11:56.045 [notice] Opening OR listener on 0.0.0.0:443
Jul 14 14:11:56.045 [warn] Could not bind to 0.0.0.0:443: Permission  
denied

A tor restart seemed to fix the problem, with logs showing

ORPort [my-IP]:443

as being reachable from the outside.

Don't want to have to manually restart every day. Any idea what the  
problem might be and how to fix it?

Thanks in advance,

Dave