Add this to your SSH Config:

```
Host unhb4
    #Key: SHA256:pgNNZwqtDY4rkx99svN+UMwZ1W30kS44CJNsRbuavvg (ed25519)
    HostName server4.unhb.de
    User root
    LocalForward 9000 localhost:9000
Host unhb-proxmox-local
    #Key: SHA256:VoFtWYe3YhGSEK0m3M2O4GHxRqk0X3QwtH5rhnUo7/I (ed25519)
    HostName proxmox.unhb.space
    User root
```

The door is currently not managed via Ansible, but here is its config anyway:

```
Host unhb-door
    HostName 192.168.88.244
    User keymaster
    IdentityFile ~/.ssh/YOUR_IDENTITY_FILE_FOR_THE_DOOR
```