Open one SSH/VNC connection, but not another
jaanusk "at" myrealbox.com
Sat Jan 31 20:22:01 2004
On 26 Jan 2004 at 18:39, William Hooper wrote:
> > I have set up a VNC server on my SUSE 9 host, and try to connect to
> > it with Putty/TightVNC.
> > The connection is established ok. Ports 5900 and 5901 are
> > also forwarded (I can see in the event log of Putty).
> Please describe what your PuTTY settings are.
Host Name: xxx.xxx.xxx.xxx port 113 (this is the only port open on the Linux
machine, and sshd is listening on that port)
When I connect to the Linux machine, the Putty's event log says:
2004-01-31 22:05:07 Local port 5900 forwarding to localhost:5900
2004-01-31 22:05:07 Local port 5901 forwarding to localhost:5901
2004-01-31 22:05:07 Local port 5902 forwarding to localhost:5902
2004-01-31 22:05:07 Allocated pty
2004-01-31 22:05:07 Started a shell/command
Using: SSH2, compression enabled.
> > Then I start the VNCserver on Linux machine with
> > vncserver -depth 16-geometry 1024x768
> > After that the server announces something like that:
> > New 'X' desktop is
> > linux:1
> > However, when I try to connect from my Win98 machine with TightVNC
> > to localhost:1, in the Putty's event log I can see the
> > Forwarded connection refused by server remark.
> Sounds like it might be an SSH issue.
> > At the same time, when connecting to localhost:0, everything
> > works fine, however the vncserver is that of another user.
> > I tried telnet localhost:1 and it returned a line starting with
> > RFB, so the VNCserver seems to be working ok.
> On the SSH client machine, or the linux machine?
On the linux machine.
Below is evidence that Xvnc is running.
jaanus "at" linux:~> lsof -Pai -c Xvnc
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
Xvnc 8603 jaanus 0u IPv4 147372 TCP *:6001 (LISTEN)
Xvnc 8603 jaanus 3u IPv4 147393 TCP localhost:5901 (LISTEN)
Xvnc 8603 jaanus 4u IPv4 147394 TCP localhost:5801 (LISTEN)
Xvnc 8968 jaanus 0u IPv4 165945 TCP *:6002 (LISTEN)
Xvnc 8968 jaanus 3u IPv4 165977 TCP *:5902 (LISTEN)
Xvnc 8968 jaanus 4u IPv4 165978 TCP *:5802 (LISTEN)
OK, when I try to connect to port 5902 with the VNCviewer I get connection
linux:/home/jaanus # tcpdump -i lo port 5902
tcpdump: listening on lo
22:20:14.624440 localhost.33206 > localhost.5902: S 856660152:856660152(0) win
32752 <mss 16376,sackOK,timestamp 30424865 0,nop,wscale 0>
22:20:14.624463 localhost.5902 > localhost.33206: R 0:0(0) ack 856660153 win 0