A summary of remote access methods for computing resources.
Chemistry Department web proxy service
The Department runs a proxy server which can be used for off-site access to webpages that are otherwise only accessible from computers that are either within the University or within the Department.
Proxy service for journal access
The University Library offers a proxy server which can be used for off-site access to some journals for which the University has a subscription.
Virtual Private Networks (VPNs) enable IP traffic to travel securely over a public TCP/IP network (e.g. the Internet) by encrypting all traffic from one network to another. Effectively you get an IP address on the private network.
Information about the Departmental VPN service, including downloadable installer packages, is available.
The University Computing Service provide a VPN Service which will get you an IP address in cam.ac.uk but most chemists will probably want to use the Chemistry service as that gives you more access to journals.
ssh access via a Bastion host
There's documentation for simple use of SSH (Secure SHell), SFTP (Secure FTP) and SCP (Secure Copy).
If you regularly access particular machines by SSH (your desktop, for example), having this in your SSH config file (~/.ssh/config) should save you some bother: (The configuration tells ssh when connecting to myworkmachine.ch.private.cam.ac.uk to first open an ssh connection to citadel.ch.cam.ac.uk and route the connection to myworkmachine over the connection to citadel.)
Host myworkmachine.ch.private.cam.ac.uk User CRSID ProxyCommand ssh -l CRSID citadel.ch.cam.ac.uk -W myworkmachine.ch.private.cam.ac.uk:22
Remote Access to Windows Desktop
ssh -CL 3390:renown.ch.cam.ac.uk:3389 CRSID@citadel.ch.cam.ac.uk rdesktop localhost:3390 &