!!! How to avoid disconnection of a VPN session {{category VPN}}{{category Network}} The VPN of the multi-wavelength analysis system has a non-communication timeout of 3 hours. You can avoid this timeout by communicating in the meantime. As methods of continuous communication fore more than 3 hours, you can open a terminal and execute the top command to display the result continuously, or set ServerAliveInterval in the ssh client settings. Alternatively, if you use VNC, you can continue the analysis even though the VPN is disconnected.