Several tools exist to generate SSH public/private key pairs. The following sections show how to generate an SSH key pair on UNIX, UNIX-like and Windows platforms.
Generating an SSH Key Pair on UNIX and UNIX-Like Platforms Using the ssh-keygen Utility
Jun 09, 2018 Steps to regenerate OpenSSH host keys on Linux. Step 1 – Delete old ssh host keys. Login as the root and type the following command to delete files on your SSHD server: # /bin/rm -v /etc/ssh. Step 2 – Debian or Ubuntu Linux Regenerate OpenSSH Host Keys. Step 3 – Update all ssh client(s).
UNIX and UNIX-like platforms (including Solaris and Linux) include the ssh-keygen utility to generate SSH key pairs.
To generate an SSH key pair on UNIX and UNIX-like platforms using the ssh-keygen utility:
Generating an SSH Key Pair on Windows Using the PuTTYgen Program
The PuTTYgen program is part of PuTTY, an open source networking client for the Windows platform.
To generate an SSH key pair on Windows using the PuTTYgen program:
A step-by-step guide for enabling EFS keystore access while OpenSSH Public Key Authentication is used
What is EFS?![]()
In general, the Encrypted Files System (EFS) support on AIX enables individual users on the system to encrypt their data and also access it through keyed protection. Users will be able to setup keys and assign a default key for EFS. These keys are stored in cryptographically protected key store and upon successful login, the user's keys are loaded into the kernel and associated with the kernel processes.
Private keys are associated to users and groups. These keys are stored in keystores and are protected by passwords. A user keystore contains the user's private key and also password to open the user's group keystores; the group keystores contain the groups' private keys.
When a process opens a keystore, either at user login time or using a specific EFS user command, the keys contained in this keystore (and related keystores) are loaded in the kernel and associated with the process credentials. Later on,when the process needs to open an EFS protected file, these credentials are tested. If a key matching the file protection is found, then the process is able to decrypt the file key and therefore the file content.
Keystore creation or opening can happen at login time, by the way of an EFS LAM (old) or PAM (new) module. These modules, as well as the commands (for example, chmod) make calls to some EFS APIs provided by a libefs.a library. Two user commands exist, efsmgr and efskeymgr, to give some control over EFS to the user and administrator.
How to setup Public Key Authentication in OpenSSH
Create a user on the client side and generate keys for this user. Public-private key pairs can be generated using the ssh-keygen command. Fences 3 product key generator windows 10.
![]()
Similarly, any number of a Client user's public key can be copied in the file ~/.ssh/authorized_keys file on server user account.
AIX EFS Configurations
EFS has to be enabled on the server side using the efsenable command. This creates an admin keystore. The keystore gets created for a user in two cases.
The path where user keystore gets created on the system is /var/efs/users/<userlogin>/keystore.
The format of user keystore is in PKCS#12 which contains public and private objects. Private objects are protected by user access key. This user access key is nothing but a hash of a user-defined password (either login password or another password specific to EFS).
Public key cookie needs to be created and inserted into the keystore on server side. User invokes the efskeymgr command to insert the cookie. A public key cookie is the passwd encrypted with users public key.
The following steps show how to create a keystore for a user and insert the public key cookies.
When all the previous configuration setting are complete, run the ssh to log onto the remote machine using the public key authentication.
Run the following command to log on to the remote machine:
Jan 16, 2020 Microsoft Office 2007 Crack + Product Key (64/32) Bit Free Download Microsoft Office is the ideal pc software employing this program, you can quickly write the text and a lot of different applications. This program is your perfect software workplace activator for several editions. The user could also use this program.
![]()
Verify the authentication and EFS login
The OpenSSH client user ram is all set for Public Key authentication to user laxman on the OpenSSH server with EFS login. Verify the same with ssh login from client:
Applications for this setup
This setup can be used along with DB2 UDB DPF for which OpenSSH public key authentication can be used. The DB2 tables are encrypted using EFS.
Troubleshooting
Check if all the configurations listed above have been performed. Check if the public key cookie is inserted properly byefskeymgr command by verifying the keystore file size before and after the insertion. Enable debug for sshd and check if any failures. Also, verify once with password authentication if the account login and efs login succeed.
Downloadable resourcesRelated topicsAix Ssh Configuration
Comments are closed.
|
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |