How to fix pgAdmin4 connection refused error - postgresql

Question

I'm getting this error when attempting to setup a new server on pgAdmin4:
Unable to connect to server:
could not connect to server: Connection refused (0x0000274D/10061)
Is the server running on host "192.168.210.146" and accepting
TCP/IP connections on port 5432?
I have postgres 12.7 running on CentOS 8 inside a virtual box 6.1 VM which is running on my Windows 10 21H1 laptop. I can connect to the OS using putty and the CentOS web client just fine.
Here is some network info via the CentOS web client terminal:
# nmap localhost
Starting Nmap 7.70 ( https://nmap.org ) at 2021-07-14 16:59 PDT
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000014s latency).
Other addresses for localhost (not scanned): ::1
Not shown: 996 closed ports
PORT STATE SERVICE
22/tcp open ssh
111/tcp open rpcbind
5432/tcp open postgresql
9090/tcp open zeus-admin
Nmap done: 1 IP address (1 host up) scanned in 1.68 seconds
netstat -tlpn
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1/systemd
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 954/sshd
tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN 972/postmaster
tcp 0 0 127.0.0.1:37753 0.0.0.0:* LISTEN 1620/cockpit-bridge
# firewall-cmd --list-all
public (active)
target: default
icmp-block-inversion: no
interfaces: enp0s3
sources:
services: cockpit dhcpv6-client postgresql ssh
ports: 5432/tcp
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
#
# ifconfig
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.210.146 netmask 255.255.254.0 broadcast 192.168.211.255
inet6 fe80::a00:27ff:fecb:8d2d prefixlen 64 scopeid 0x20<link>
ether 08:00:27:cb:8d:2d txqueuelen 1000 (Ethernet)
RX packets 4704 bytes 512333 (500.3 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 3757 bytes 2510585 (2.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 7252 bytes 2161674 (2.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 7252 bytes 2161674 (2.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
In the PgAdmin setup server screen I'm using the ip address listed above of 192.168.210.146, user postgres and its password, port 5432 and the database is set to postgres.
I get this same error trying to establish odbc and jdbc connections from my laptop but I'm not sure what in the postgres environment needs to be fixed.I did add 1 entry the pg_hba.conf file as shown below, but that didn't help:
# IPv4 local connections:
host all all 127.0.0.1/32 ident
host all all 192.168.210.146/32 trust #added;not helping
Is there another file or setting that needs to be fixed?
Thanks.

Answer 1

The solution was to first un-comment the listen_address entry in postgresql.conf and then set it to the necessary ip number. Everything connects just fine now. Thanks