Are you able to use FMSADMIN in the command line to check and see if the filemaker services are running or responding?
You can try a few commands, such as FMSADMIN START SERVER
Type FMSADMIN HELP COMMANDS to get a list of all commands you can use, or read the FMS13 server guide for a more detailed explanation.
You can check services under admin tools > services. If you have server set to NOT auto-start with the operating system, you might need to manually start these after a reboot.
The admin server works on the same engine as the web publishing engine, so I assume that WebDirect and CWP are also not working currently.