Access to fawcett

Pre-requisites

Please ensure that you know how to access your Maths computer account and that you have been given an account on fawcett (more details here).

To access fawcett users need to ssh to fawcett.maths.cam.ac.uk. The direct access is possible only from desktops managed by Maths IT team and does not require a password. Access from other systems is possible only with usage of pair of ssh keys and by proxying the connection through ssh.maths.cam.ac.uk:

Linux

1. Generate a pair of ssh keys. It is useful to have a pair of keys per destination:

   ssh-keygen -f $HOME/.ssh/fawcett 

   Secure the key with a strong passphrase when prompted.

2. Copy public key to a Maths computer:

   scp $HOME/.ssh/fawcett.pub CRSID@ssh.maths.cam.ac.uk:

3. Now ssh to your account in Maths and there run command:

   ssh-copy-id -f -i $HOME/fawcett.pub fawcett 

   Now you can remove fawcett.pub from ssh.maths.cam.ac.uk

4. Now you should be able to access fawcett with command:

   ssh  -i $HOME/.ssh/fawcett  -J CRSID@ssh.maths.cam.ac.uk CRSID@fawcett.maths.cam.ac.uk

5. You can automate the options above by adding the following lines to file

   $HOME/.ssh/config on your computer:
       Host fawcett.maths.cam.ac.uk
       User CRSID
       ProxyJump CRSID@ssh.maths.cam.ac.uk
       IdentityFile ~/.ssh/fawcett

   Afterwards you should be able to connect to fawcett with command:

   ssh fawcett.maths.cam.ac.uk

6. If that fails then please send the output of
   

   ssh -v fawcett.maths.cam.ac.uk

   to the IT helpdesk.