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SSH tunnelling

ssh can be used to set up a tunnel between your home machine and a Maths machine, which enables you to make connections from your home machine as if it were the Maths machine. This is often useful for getting through firewalls - they may be configured to block certain protocols to prevent snooping, but when an ssh tunnel is used all the traffic is encrypted.

Some situations where ssh tunnels are used in the CMS:

Instead of creating a tunnel and making specific applications use it, you can connect to a VPN so that all of your home machine's Internet connections appear to come from a Maths machine (if using the Maths VPN Service) or a Cambridge machine outside Maths (if using the UIS VPN Service).