Cannot connect to postgres from remote host

Question

I have a database server (192.168.1.50) running postgres. I have created a database named \"testdb\" and a user \"testuser\" with password \"testuserpw\".
Locally, I can

Answer 1

I came across the same problem as yours, and my source of problem is the firewall settings. If you're using Ubuntu, print your firewall status: sudo ufw status verbose

It may looks like this:

Logging: on (low)
Default: deny (incoming), allow (outgoing), disabled (routed)
New profiles: skip
...

The default rule of incoming connection is "deny", so you need to specify the "allow"ed port.

type: sudo ufw allow 5432/tcp

reference: https://www.vultr.com/docs/how-to-configure-ufw-firewall-on-ubuntu-14-04