Windows RealVNC server not accepting connections
mbmiller+l at gmail.com
Fri Oct 28 22:06:07 BST 2011
On Fri, 28 Oct 2011, Mike Miller wrote:
> I'm running the latest Free RealVNC server in service mode on a WinXP
> box and it isn't accepting any connections. I tried to connect to
> localhost and I get a dialog box right away saying the connection closed
> unexpectedly. I'm not prompted for a password.
I realized that I was allowing connections only from a certain other
machine on the subnet, and was therefore blocking connections from
localhost. I fixed that and then was able to make the connection from
localhost. So I guess this is what we see in the event log when WinVNC is
disallowing a connection (at least if it is from localhost):
SocketManager: unknown listener event: 0
This is still a problem:
> But when I try to connect from a Linux machine on the subnet, it doesn't
> register anything. When I use nmap on the Linux box to look at the
> Windows box, I see that port 5900 is "filtered" rather than "open".
> I was able to use "vncviewer -listen" on the Linux box to receive a
> connection from the VNC server on Windows. That worked but only
> momentarily. It locked up almost right away and then the VNC server
> crashed on Windows, including the usual Microsoft request to report the
> error, which I did.
Any ideas? Why would the server crash after making a connection to a
I'm guessing that my problem making a normal connection is due to some
kind of firewalling problem. I'm trying to turn all of that off. It's
hard to figure out exactly where the problem is, though.