Can't access VNC port from local network

I've installed VNC on CentOS and enabled it on port 5901. I made sure that selinux, firewalld and iptables were disabled/stopped on the system for troubleshooting purposes. Now I can successfully test access to port 5901 (using netcat) using localhost, but if I use the IP address, even if connecting locally, I get "connection refused":

# netcat to localhost works
$ nc -vz localhost 5901
Ncat: Version 7.70 ( https://nmap.org/ncat )
Ncat: Connected to ::1:5901.
Ncat: 0 bytes sent, 0 bytes received in 0.01 seconds.

# using IP doesn't work
$ nc -vz 192.168.3.57 5901
Ncat: Version 7.70 ( https://nmap.org/ncat )
Ncat: Connection refused.

Needless to say, I can't connect with a VNC client. Does anyone have any idea of what I've missed either in my VNC configuration or firewall settings that could be causing this? Thanks in advance.

Try running vncserver with -localhost no. IIRC, vncserver will only listen on localhost by default.