Dell PowerEdge R830 Integrated Remote Access Controller 8 Version 2.70.70.70 U - Page 120

Using public key authentication for SSH, Generating public keys for Windows

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Scheme Type Encryption MAC Compression Algorithms ecdh-sha2-nistp384 ecdh-sha2-nistp521 diffie-hellman-group-exchange-sha256 diffie-hellman-group14-sha1 [email protected] aes128-ctr aes192-ctr aes256-ctr [email protected] [email protected] hmac-sha1 hmac-ripemd160 [email protected] None NOTE: If you enable OpenSSH 7.0 or later, DSA public key support is disabled. To ensure better security for iDRAC, Dell recommends not enabling DSA public key support. Using public key authentication for SSH iDRAC supports the Public Key Authentication (PKA) over SSH. This is a licensed feature. When the PKA over SSH is set up and used correctly, you must enter the user name while logging into iDRAC. This is useful for setting up automated scripts that perform various functions. The uploaded keys must be in RFC 4716 or OpenSSH format. Else, you must convert the keys into that format. NOTE: If you enable OpenSSH 7.0 or later, DSA public key support is disabled. To ensure better security for iDRAC, Dell recommends not enabling DSA public key support. In any scenario, a pair of private and public key must be generated on the management station. The public key is uploaded to iDRAC local user and private key is used by the SSH client to establish the trust relationship between the management station and iDRAC. You can generate the public or private key pair using: • PuTTY Key Generator application for clients running Windows • ssh-keygen CLI for clients running Linux. CAUTION: This privilege is normally reserved for users who are members of the Administrator user group on iDRAC. However, users in the 'Custom' user group can be assigned this privilege. A user with this privilege can modify any user's configuration. This includes creation or deletion of any user, SSH Key management for users, and so on. For these reasons, assign this privilege carefully. CAUTION: The capability to upload, view, and/ or delete SSH keys is based on the 'Configure Users' user privilege. This privilege allows user(s) to configure another user's SSH key. You should grant this privilege carefully. Generating public keys for Windows To use the PuTTY Key Generator application to create the basic key: 1. Start the application and select RSA for the key type. 2. Enter the number of bits for the key. The number of bits must be between 2048 and 4096 bits. 3. Click Generate and move the mouse in the window as directed. The keys are generated. 4. You can modify the key comment field. 5. Enter a passphrase to secure the key. 120 Setting up iDRAC communication

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Scheme Type
Algorithms
ecdh-sha2-nistp384
ecdh-sha2-nistp521
diffie-hellman-group-exchange-sha256
diffie-hellman-group14-sha1
Encryption
aes128-ctr
aes192-ctr
aes256-ctr
MAC
hmac-sha1
hmac-ripemd160
Compression
None
NOTE:
If you enable OpenSSH 7.0 or later, DSA public key support is disabled. To ensure better security for iDRAC, Dell
recommends not enabling DSA public key support.
Using public key authentication for SSH
iDRAC supports the Public Key Authentication (PKA) over SSH. This is a licensed feature. When the PKA over SSH is set up and used
correctly, you must enter the user name while logging into iDRAC. This is useful for setting up automated scripts that perform various
functions. The uploaded keys must be in RFC 4716 or OpenSSH format. Else, you must convert the keys into that format.
NOTE:
If you enable OpenSSH 7.0 or later, DSA public key support is disabled. To ensure better security for iDRAC, Dell
recommends not enabling DSA public key support.
In any scenario, a pair of private and public key must be generated on the management station. The public key is uploaded to iDRAC local
user and private key is used by the SSH client to establish the trust relationship between the management station and iDRAC.
You can generate the public or private key pair using:
•
PuTTY Key Generator
application for clients running Windows
•
ssh-keygen
CLI for clients running Linux.
CAUTION:
This privilege is normally reserved for users who are members of the Administrator user group on iDRAC.
However, users in the ‘Custom’ user group can be assigned this privilege. A user with this privilege can modify any
user’s configuration. This includes creation or deletion of any user, SSH Key management for users, and so on. For
these reasons, assign this privilege carefully.
CAUTION:
The capability to upload, view, and/ or delete SSH keys is based on the ’Configure Users’ user privilege. This
privilege allows user(s) to configure another user's SSH key. You should grant this privilege carefully.
Generating public keys for Windows
To use the
PuTTY Key Generator
application to create the basic key:
1.
Start the application and select RSA for the key type.
2.
Enter the number of bits for the key. The number of bits must be between 2048 and 4096 bits.
3.
Click
Generate
and move the mouse in the window as directed.
The keys are generated.
4.
You can modify the key comment field.
5.
Enter a passphrase to secure the key.
120
Setting up iDRAC communication