I have Debian unstable installed on my machine, and I'm trying to set it up so that I can connect remotely using vncviewer.

I'm running gdm, and I've enabled XDMCP. I've also opened port 5900 on my router's firewall and made it direct to my local IP. I copied this configuration from another computer:

/etc/inetd.conf:
vnc-rfb-0 stream tcp nowait chadman /usr/bin/Xvnc Xvnc -inetd -query localhost -once -geometry 800x600 -depth 24 -desktop RemoteDesktop
vnc-rfb-1 stream tcp nowait chadman /usr/bin/Xvnc Xvnc -inetd -query localhost -once -geometry 1024x768 -depth 24 -desktop RemoteDesktop
vnc-rfb-2 stream tcp nowait chadman /usr/bin/Xvnc Xvnc -inetd -query localhost -once -geometry 1152x864 -depth 24 -desktop RemoteDesktop
vnc-rfb-3 stream tcp nowait chadman /usr/bin/Xvnc Xvnc -inetd -query localhost -once -geometry 1280x1024 -depth 24 -desktop RemoteDesktop


/etc/services:
vnc-rfb-0 5900/tcp
vnc-rfb-1 5901/tcp
vnc-rfb-2 5902/tcp
vnc-rfb-3 5903/tcp
vnc-rfb-4 5904/tcp
vnc-rfb-5 5905/tcp
vnc-rfb-6 5906/tcp
vnc-rfb-7 5907/tcp
vnc-rfb-8 5908/tcp
vnc-rfb-9 5909/tcp

I also installed the vnc packages with

apt-get install vnc4server
apt-get install vncserver

and when I try to connect to my computer with vncviewer, it says "Attemting to connect to host..." and then the vncviewer dialog just disappears. I looked in the task manager (using Windows locally btw) and it says vncviewer.exe is still running.

I can connect to my computer using Putty just fine.

Any ideas why it's not working?

Nevermind, I got it. I forgot to restart my services. I'm new to Linux.

Now when I try to connect remotely, I enter my password and I get "No password configured for VNC auth!" I ran vncpasswd as root and also as the account that I always use for myself, but I still get that message.

Alright, I figured it out. In my /etc/inetd.conf file, I needed to pass "securitytypes=none" as an argument to Xvnc.

Very cool stuff! working great now!

How you do that, pass "securitytypes=none" as an argument to Xvnc??
I have exactly the same problem and want to know how i can get rid of it

Sorry it took me so long to reply.

At the bottom of my /etc/inetd.conf file, I added the following lines:

vnc-800x600 stream tcp nowait nobody /usr/bin/Xvnc Xvnc -inetd -query localhost -geometry 800x600 -depth 24 securitytypes=none
vnc-1024x768 stream tcp nowait nobody /usr/bin/Xvnc Xvnc -inetd -query localhost -geometry 1024x768 -depth 24 securitytypes=none
vnc-1152x864 stream tcp nowait nobody /usr/bin/Xvnc Xvnc -inetd -query localhost -geometry 1152x768 -depth 24 securitytypes=none
vnc-1280x1024 stream tcp nowait nobody /usr/bin/Xvnc Xvnc -inetd -query localhost -geometry 1280x1024 -depth 24 securitytypes=none

Then at the bottom of my /etc/services file, I added these lines:

vnc-800x600 5900/tcp
vnc-1024x768 5901/tcp
vnc-1152x864 5902/tcp
vnc-1280x1024 5903/tcp

As you can see, in inetd.conf I had to add securitytypes=none at the end of each service. I'd make sure you reboot too, or at least restart your services.