Answer by Emil Widmann for I have access to a remote server through a gate computer with this command:ssh -fN -l user -L port:host:22 gate #To Bring up the tunnelssh -X -p port user@localhost #To open an X session to my serverOnce on the server I run sage by typing "./sage" in the installation directory. Now the questions:1)Which are the right commands to bring up the remote notebook server?2)What should I type in my local browser? (I suppose something like 'localhost:port', but even without launching the notebook server I get the following error:'SSH-2.0-OpenSSH_4.3 Protocol mismatch')I tried to read the instructions and the wiki, but I confess that I am at a loss.Thanks a lotGiovanni

start sage with *./sage -notebook* This will bring up the server on port 8000 Then try to connect with it from your local browser with *host:8000* If you can get no connection you should check if any firewalls are up to block this port. In rare cases port 8000 is already in use then you could bring up another port with .*/sage -notebook port=8080*.