Our system is not working, I get a "Bad Gateway" message when opening it; Knowing that yesterday was working properly and no one pushes any update.

when I open psql or odoo-bin shell I get  (psql: could not connect to server: Connection refused
Is the server running on host "192.168.1.1" and accepting
TCP/IP connections on port 5432?)

that's very weird as our company operation is down!! is there any emergency contact to reach, I opened a task and called the emergency number of Asia and till now I have had no feedback