# Unable to connect to Preview on a remote machine

**URL:** https://discourse.paraview.org/t/unable-to-connect-to-preview-on-a-remote-machine/13851
**Category:** ParaView Support
**Tags:** vtk
**Created:** [February 2, 2024, 11:21pm UTC](https://discourse.paraview.org/t/unable-to-connect-to-preview-on-a-remote-machine/13851 "2024-02-02T23:21:11Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Sara](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/a5b964/32.png) [@Sara](https://discourse.paraview.org/u/Sara)
#### Post date: [February 2, 2024, 11:21pm UTC](https://discourse.paraview.org/t/unable-to-connect-to-preview-on-a-remote-machine/13851/1 "2024-02-02T23:21:11Z")

</div>

Hello,

I am unable to create the connection on Paraview on a remote machine. The error is the following:  
"  
Error: in /opt/glr/paraview/paraview-ci/build/superbuild/paraview/src/VTK/Common/System/vtkClientSocket.cxx,line 51vtkClientSocket (0x6000001ebscb00):Failed to connect to server localhost:11111  
"

Here is the description of the steps that I followed:

1. Connect to the remote machine, allocate a node, verify that the node is running using “squeue”, then ssh to that node.

2. Setup a tunnel between my computer and that node using:  
ssh -N -L 11111:nodename:11111 email\_adresse\_of\_the\_remote\_machine

3. Verify that the tunnel is running:  
local\_machine\> ps aux | grep ssh

4. Go back to the remote machine and type:  
/path\_to\_paraview/paraview/bin/mpiexec -n 20 /path\_to\_paraview/paraview/bin/pvserver

It returns:  
"waiting for client…  
Connection URL: cs//node\_name:11111  
Accepting connection(s): node\_name:11111  
"

1. I open the same version of Paraview than the one that I have installed on the remote machine, which is 5.10.1

File \> Connect \> Add Server \>  
Name: add name  
Server Type: Client /Server  
Host: localhost  
Port: 11111  
Save \> Connect

After 1min, it gave me the following error:  
Error: in /opt/glr/paraview/paraview-ci/build/superbuild/paraview/src/VTK/Common/System/vtkClientSocket.cxx,line 51vtkClientSocket (0x6000001ebscb00):Failed to connect to server localhost:11111

I just want to mention that I also tried working with Paraview-5.9.1 both on remote machine and local machine, and I did had the same error.  
I also tried different port 11511, 11611, instead of 11111, it does not help!

Another extra information, when I uninstall paraview and reinstall it again, it does keep in memory the connection that I tried before. I am wondering if there is something wrong with my setup!

PS: I also tried different remote machines, and still always the same problem.

Please feel free to share any suggestions that could be helpful!

I do appreciate your help!

Thank you,  
Best,

Sara Youssoufi