While setting up a new PostgreSQL server, I noticed that I was getting a
connection refused error while trying to connect to it. After checking the firewall settings and finding everything in order, I decided to check things in the host.
I used ss to inspect connections listening on port 5432 (Default port used by PostgreSQL):
1 2 3 $ ss -tna src :5432 State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 128 127.0.0.1:5432 0.0.0.0:*