How do I connect to an IPv6-only proServer (proServer2G)?

If IPv6 connectivity is available, a connection to proServer2G can be established directly. Otherwise, access must be tunneled through a so-called jump host. In practice, this is usually handled by adding an appropriate entry to the developer’s ~/.ssh/config file, but it can also be done manually using the appropriate command-line parameters. For the following examples, we’ll use “vproWXYZ” as both the host and the username.

Example of SSH via a jump host with explicit parameters:

ssh -J jumping@ssh-jumphost.karlsruhe.punkt.de vproWXYZ@vproWXYZ.proserver.punkt.de

Example of uploading `file.tar` via a jump host with explicit parameters:

scp -o ProxyJump=jumping@ssh-jumphost.karlsruhe.punkt.de file.tar.gz vproWXYZ@vproWXYZ.proserver.punkt.de:

It is usually more convenient to create an entry like the following in ~/.ssh/config:

Host vproWXYZ
      HostName vproWXYZ.proserver.punkt.de
      User vproWXYZ
      ProxyJump jumping@ssh-jumphost.karlsruhe.punkt.de

Then, for SSH access, a simple

ssh vproWXYZ