I'm running CentOS 6 with Gnome's built in "Remote Desktop" set up to give me remote access. I have this set up on 3 machines, but for some reason one of them is refusing connections.
Whilst trying to figure out what's wrong, I've disabled the software firewall on the server and also disabled SELinux. I've rebooted it and disabled and re-enabled the Remote Desktop. I'm on the same local LAN subnet with no routers/firewalls/etc in the way.
I'm half tempted to switch Remote Desktop off and install a VNC server myself, but I'd rather just figure out why the one it's got isn't working.