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When using SSH, the SSH server and the SSH client transmit the supported encryption algorithms to each other. As the SSH server always selects the first algorithm from the list of the SSH client , the server also supports, it is Bei Verwendung von SSH übermitteln der SSH-Server und der SSH-Client sich gegenseitig die unterstützten Verschlüsselungs-Algorithmen. Da der SSH-Server immer den ersten Algorithmus aus der Liste des SSH-Clients auswählt, den der Server unterstützt, ist es ausreichend die bevorzugten Algorithmen im Client anzupassen.is sufficient to restrict the preferred algorithms in the client. |
Requirement:
- SSH - client (e.g. PuTTY)
Procedure:
General procedure:
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Procedure for the SSH client PuTTY:
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In PuTTY the there are no options to configure hash algorithms. It is therefore suffictient sufficient to modify the encryption algorithsalgorithms. |
1) Open PuTTY and navigate to the menu Connection → SSH → Cipher.
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2) Move the following algorithms as follows via Drag & Drop or via the the Up and Down buttons as follows:
- AES-GCM has to be moved to the top.
- AES has to be moved to the second position.
- ChaCha20 has to be moved below "warn below here".
- 3DES has to be moved below "warn below here".
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