For Rstudio Server go to http://rstudio.iac.ethz.ch:8787 (accessible inside ETH or VPN)
Note: The service runs over unencrypted HTTP connection, but your login credentials will be sent encrypted
Problems to access Rstudio Server or JupytherHub, connect first to VPN (more help in German or English).
Please install a VPN client like Cisco Anyconnect. Web VPN is not supported.