To access the VNC server you have to create a tunnel between the login node using TCP port 5961 and your machine using a free TCP port (for simplicity the very same) in next step. See examples for [Linux/Mac OS](#linuxmac-os-example-of-creating-a-tunnel) and [Windows](#windows-example-of-creating-a-tunnel).
!!! note
The tunnel must point to the same login node where you launched the VNC server, eg. login2. If you use just cluster-name.it4i.cz, the tunnel might point to a different node due to DNS round robin.
...
...
@@ -201,11 +200,9 @@ Or this way:
[username@login2 .vnc]$pkill vnc
```
!!! note
Do not forget to terminate also SSH tunnel, if it was used. Look on end of [this section](#linuxmac-os-example-of-creating-a-tunnel) for the details.
## GUI Applications on Compute Nodes Over VNC
The very same methods as described above, may be used to run the GUI applications on compute nodes. However, for maximum performance, proceed following these steps:
