SSH proxy jump

As the collective sandbox servers are hosted from the school, they use a hidden VPN network to connect to the internet, famously known as the HUB.

To be able to SSH to a sandbox server from outside of the school, you can use a SSH proxy jump.

The SSH proxy jump will make a connection to the sandbox through XPUB's XVM server.

Using a SSH proxy jump to access a sandbox server

Download the jump key files from Zulip and save them to the ~/.ssh/ on your laptop (not on the sandbox!):

jump
jump.pub

Copy the following config file, change the USERNAME to your username, and save it to ~/.ssh/config on your laptop:

Host xvm_jump
User jump
Hostname 194.61.65.6
Port 2501
Identityfile ~/.ssh/jump

Host sandbox
Hostname 10.0.0.XXX
User USERNAME
ProxyJump xvm_jump
Identityfile ~/.ssh/id_ed25519

Now, you should be able to ssh to the sandbox, both from the school and outside the school, with this command:

$ ssh chopchop

Using a SSH proxy jump to access a sandbox server

See also