Suddenly denied on a newly installed TigerVNC server.

Hi guys,

I am considering signing onto the RHCSA and in that capacity, I Just installed tigerVNC and Vino on a CentOS 6.5 following these instructions:

http://barelalessandro.blogspot.de/2...istration.html

I furthermore set it to auto-start at boot-up.

I tested it from another PC on the same LAN right after and it worked just fine, but the day after, I suddenly get "Connection Refused" in Remmina. What happened?

Firewalls are off on both client and server.
No hosts.deny rules on server or client.
MAC filtering in router is off (shouldn't matter as both machines are internal on the same LAN).
No SHH tunnelling, raw VNC connection.
Restarting TigerVNC does nothing.
Remote users are allowed to both view- and control the server in Vino's settings on the server.
I have restarted the whole server too, problem persists.

What am I missing?

Good evening,
Can I have details of socket programming.