Why can't I login to a cluster using SSH?

You try to login to a cluster using SSH and get an error:

ssh della.princeton.edu
ssh_exchange_identification: Connection closed by remote host

You are probably using a dormnet connection or are connecting from off-campus.

If this is the case, you need to do one of the following:

  • setup a VPN connection, and then connect to the cluster directly. For more information about installing VPN software on your workstation or laptop, see the OIT Knowledgebase article on VPN.
  • ssh to a host on the wired on-campus network (e.g., nobel.princeton.edu), and then ssh to the cluster from there