Key Fingerprints¶
Hint
The key fingerprints of login and dataport nodes can occasionally change. This page holds up-to-date fingerprints.
Each cluster can be accessed via so-called login nodes using specific hostnames. All login nodes of a cluster share common SSH key fingerprints that are unique. When connecting to one of our HPC systems via the corresponding login nodes, please make sure that the provided fingerprint matches one of the table. This is the only way to ensure you are connecting to the correct server from the very beginning. If the fingerprint differs, please contact the HPC support team.
In case an additional login node of the same cluster is used, the key needs to be checked and approved again.
Connecting with SSH to Barnard
marie@local$ ssh login1.barnard.hpc.tu-dresden.de
The authenticity of host 'login1.barnard.hpc.tu-dresden.de (172.24.95.28)' can't be established.
ECDSA key fingerprint is SHA256:8Coljw7yoVH6HA8u+K3makRK9HfOSfe+BG8W/CUEPp0.
Are you sure you want to continue connecting (yes/no)?
In this case, the fingerprint matches the one given in the table. Thus, you can proceed by typing 'yes'.
Verify key fingerprints without login
To verify the fingerprint without login, use ssh-keyscan and ssh-keygen:
marie@local$ ssh-keyscan login1.barnard.hpc.tu-dresden.de 2>/dev/null | ssh-keygen -l -f -
3072 SHA256:lVQOvnci07jkxmFnX58pQf3cD7lz1mf4K4b9jZrAlVU login1.barnard.hpc.tu-dresden.de (RSA)
256 SHA256:Xan2MYazewT0V5agNazaQfWzLKBD3P48zRwR6reoXhI login1.barnard.hpc.tu-dresden.de (ECDSA)
256 SHA256:Gn4n5IX9eEvkpOGrtZzs9T9yAfJUB200bgRchchiKAQ login1.barnard.hpc.tu-dresden.de (ED25519)
Change of Key Fingerprints¶
The message "REMOTE HOST IDENTIFICATION HAS CHANGED" means that your SSH client has detected a change in the server's host key. This is a security warning designed to prevent man-in-the-middle attacks.
When you first connect to an SSH server (e.g. our login and dataport nodes), its host key is stored
in the ~/.ssh/known_hosts file on your local system. On subsequent connections, the SSH client
checks whether the server's host key matches the stored one. If the key has changed, SSH will refuse
to connect and display a corresponding warning.
There are two possible reasons for this warning:
- Legitimate changes: The HPC admin team intentionally changed the SSH host key. If so, you will
find the updated key fingerprint for the node on this page and you need to manually remove the
old key from the file
~/.ssh/known_hosts. - Security concerns: There is a potential man-in-the-middle attack, or a compromised node that has been replaced with a malicious system. If you do not find the offered key fingerprint on this page, do not proceed and send a ticket to the HPC admin team
Barnard¶
The cluster Barnard can be accessed via the
four login nodes login[1-4].barnard.hpc.tu-dresden.de. (Please choose one concrete login node when
connecting, see example below.)
| Key Type | Fingerprint |
|---|---|
| RSA | SHA256:lVQOvnci07jkxmFnX58pQf3cD7lz1mf4K4b9jZrAlVU |
| RSA | MD5:5b:39:ae:03:3a:60:15:21:4b:e8:ba:72:52:b8:a1:ad |
| ED25519 | SHA256:Gn4n5IX9eEvkpOGrtZzs9T9yAfJUB200bgRchchiKAQ |
| ED25519 | MD5:e8:10:96:67:e8:4c:fd:87:f0:c6:4e:e8:1f:53:a9:be |
| ECDSA | SHA256:Xan2MYazewT0V5agNazaQfWzLKBD3P48zRwR6reoXhI |
| ECDSA | MD5:02:fd:ab:c8:39:f9:94:cc:3f:e0:7e:78:5f:76:b8:4c |
Romeo¶
The cluster Romeo can be accessed via the two
login nodes login[1-2].romeo.hpc.tu-dresden.de. (Please choose one concrete login node when
connecting, see example below.)
| Key Type | Fingerprint |
|---|---|
| RSA | SHA256:BvYEYJtIYDGr3U0up58q5F7aog7JA2RP+w53XKmwO8I |
| RSA | MD5:5d:dc:40:3b:8b:89:77:5d:0f:29:84:31:0f:73:25:9f |
| ED25519 | SHA256:QNjH0ulelqykywMkt3UNTG4W1HzRkHqrhu0f6oq302I |
| ED25519 | MD5:e4:4e:7a:76:aa:87:da:17:92:b1:17:c6:a1:25:29:7e |
| ECDSA | SHA256:lgxNRgGcKe7oDGuwf0WV9VPukA30kEqg0sNDLLQwu8Y |
| ECDSA | MD5:e1:bd:e4:77:06:97:f9:f3:03:18:56:66:14:5d:8d:18 |
Capella¶
The cluster Capella can be accessed via the
two login nodes login[1-2].capella.hpc.tu-dresden.de. (Please choose one concrete login node when
connecting, see example below.)
| Key Type | Fingerprint |
|---|---|
| RSA | SHA256:8YfGsVKsM9cdmngIJjD7HmDRF3OA1v6rc/6Sa7QnsHw |
| RSA | MD5:59:67:38:7c:91:a5:36:1f:d5:5c:3c:b8:99:e5:4d:62 |
| ED25519 | SHA256:pdnv4nvxq3UWMqAosme0vvlqsqxqXnjbYHkrcqYjdsg |
| ED25519 | MD5:31:15:37:f6:49:8b:80:18:2f:b0:d1:d1:d7:70:53:d4 |
| ECDSA | SHA256:0GrEjfFXz1mtaCYj2oeTqKgS1E6/F7ZaYBm0BUHo2Y0 |
| ECDSA | MD5:a4:5e:41:96:35:60:54:5c:9f:43:a3:1d:e8:ec:10:ae |
| Key Type | Fingerprint |
|---|---|
| RSA | SHA256:XK6axSenE02CkXtg4cL720R6H5y4gE4XOQSrBF1b42M |
| RSA | MD5:23:9e:c5:48:80:69:e0:99:66:ea:19:d9:df:8f:cf:70 |
| ED25519 | SHA256:p5XR74Tzemw09o8/0Z3IogE5b45w8rZq1mjZMaJM3jY |
| ED25519 | MD5:ba:a4:93:41:cc:1f:84:43:e3:ce:29:0c:ad:65:9c:eb |
| ECDSA | SHA256:FptiRI1CgwWQdb/a63Wi0z986w5xlyow7zIfc1mf5hM |
| ECDSA | MD5:9a:ee:f9:a0:d2:cb:6c:b3:bc:6a:10:c2:03:28:5e:da |
Alpha Centauri¶
The cluster Alpha Centauri can be
accessed via the two login nodes login[1-2].alpha.hpc.tu-dresden.de. (Please choose one concrete
login node when connecting, see example below.)
| Key Type | Fingerprint |
|---|---|
| RSA | SHA256:BvYEYJtIYDGr3U0up58q5F7aog7JA2RP+w53XKmwO8I |
| RSA | MD5:5d:dc:40:3b:8b:89:77:5d:0f:29:84:31:0f:73:25:9f |
| ED25519 | SHA256:QNjH0ulelqykywMkt3UNTG4W1HzRkHqrhu0f6oq302I |
| ED25519 | MD5:e4:4e:7a:76:aa:87:da:17:92:b1:17:c6:a1:25:29:7e |
| ECDSA | SHA256:lgxNRgGcKe7oDGuwf0WV9VPukA30kEqg0sNDLLQwu8Y |
| ECDSA | MD5:e1:bd:e4:77:06:97:f9:f3:03:18:56:66:14:5d:8d:18 |
Julia¶
The cluster Julia can be accessed via
julia.hpc.tu-dresden.de. (Note, there is no separate login node.)
| Key Type | Fingerprint |
|---|---|
| RSA | SHA256:MPRhcFxLstI76W8Sg/5KiQlGPVOHUGM/B0+qIZHFj9E |
| RSA | MD5:5f:22:e2:e2:c3:dc:b1:ee:a9:ba:61:af:34:f6:27:f0 |
| ED25519 | SHA256:k5zc2E0Y8zcLErDD1Ej3g0OqkoLDF22ADmfX+b+8Z9g |
| ED25519 | MD5:41:03:a2:7c:e9:4d:1c:bd:30:77:7d:91:d7:93:9f:8c |
| ECDSA | SHA256:LkHMlx6VewoPBvOhmNbue8kBsvlljtsEAjCZA8vxRWc |
| ECDSA | MD5:3f:5a:f2:f9:9d:30:5c:83:c0:e5:0e:87:42:1a:d8:b0 |
Power9¶
The cluster Power9 can be accessed via the
login node login1.power9.hpc.tu-dresden.de.
| Key Type | Fingerprint |
|---|---|
| RSA | SHA256:BvYEYJtIYDGr3U0up58q5F7aog7JA2RP+w53XKmwO8I |
| RSA | MD5:5d:dc:40:3b:8b:89:77:5d:0f:29:84:31:0f:73:25:9f |
| ED25519 | SHA256:QNjH0ulelqykywMkt3UNTG4W1HzRkHqrhu0f6oq302I |
| ED25519 | MD5:e4:4e:7a:76:aa:87:da:17:92:b1:17:c6:a1:25:29:7e |
| ECDSA | SHA256:lgxNRgGcKe7oDGuwf0WV9VPukA30kEqg0sNDLLQwu8Y |
| ECDSA | MD5:e1:bd:e4:77:06:97:f9:f3:03:18:56:66:14:5d:8d:18 |
Dataport Nodes¶
When you transfer files using the dataport nodes, please make sure that the fingerprint shown matches one of the table.
| Key Type | Fingerprint |
|---|---|
| RSA | SHA256:OERcJO6kEh+2MIhUs9U7umP0lcn8PmZpL7w5x5eJO7Y |
| RSA | MD5:7d:d3:2e:00:3a:7f:10:4b:19:71:93:0a:b1:f4:fc:3f |
| ED25519 | SHA256:/8v4QqM1jfqL7ZANJS+d26N3xfJYLWuaU8zCGc27GOA |
| ED25519 | MD5:0e:fa:08:3f:bd:2a:53:9e:e3:db:38:5c:da:ae:0c:9c |
| ECDSA | SHA256:Xr2jCqUg1zJTi+sBeLCOYhuSEeUG0AF3UfyIllctmgs |
| ECDSA | MD5:c3:42:c0:2c:94:3f:97:0d:d9:48:44:c9:a0:8e:5a:68 |