Solaris Generate Ssh Host Keys
The post details out steps to configure passwordless ssh using RSA Public Key Authentication, in other words: passwordless login using public Key. This procedure is used to reduce the number of login prompts needed to do secure remote login with Sun Secure Shell (SSH) this including also SCP ( Secure Copy) and SFTP ( Secure File Transfer). SFTP with WinSCP: Configuring SSH Public and Private Keys Using Cpanel Posted on 2015-06-29 by Mukesh M In order to use public and private key based authentication to SFTP to your server, you need to have SSH enabled on your hosting account.
- The server uses a separate public and private key to establish this connection. Also, as SSH key pairs are used to authenticate users on a server, each user will have their own public and private keys for this purpose. Generating a SSH key pair. OpenSSH comes with a tool called ssh-keygen to generate key pairs. By default, it uses 2048-bit RSA.
- A host key is a cryptographic key used for authenticating computers in the SSH protocol. Host keys are key pairs, typically using the RSA, DSA, or ECDSA algorithms. Public host keys are stored on and/or distributed to SSH clients, and private keys are stored on SSH servers.
- They mentioned - 'The sshd configuration on the host supported weak host keys and allowed password authentication on Solaris server. Enable stronger keys (2048 or 4096 bit)'. I am not clear enough, what they mean by weak ssh host keys. If it is keys under.ssh directories of all home directories, I browsed and found that only two users have id.
[donotprint][/donotprint]To regenerate keys you need to delete old files and reconfigure openssh-server. It is also safe to run following commands over remote ssh based session. Your existing session shouldn’t be interrupted.
Why regenerate new ssh server keys?
Most Linux and Unix distribution create ssh keys for you during the installation of the OpenSSH server package. But it may be useful to be able re-generate new server keys from time to time. For example, when you duplicate VM (KVM or container) which contains an installed ssh package and you need to use different keys from cloned KVM VM guest/machine.
Steps to regenerate OpenSSH host keys on Linux
Ssh Generate Key Ubuntu
Let us see all steps
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/ssh_host_*
Sample outputs:
Step 2 – Debian or Ubuntu Linux Regenerate OpenSSH Host Keys
Now create a new set of keys on your SSHD server, enter:# dpkg-reconfigure openssh-server
Sample output:
You just regenerated new ssh server keys. /adobe-dreamweaver-cs5-5-serial-key-generator-free-download.html. You need to restart ssh server:$ sudo systemctl restart ssh
OR$ /etc/init.d/ssh restart
Step 3 – Update all ssh client(s) known_hosts files
Ssh Keygen Solaris
Finally, you need to update ~/.ssh/known_hosts files on client computers, otherwise everyone will see an error message that read as follows:
Either remove host fingerprint or update the file using vi text editor (command must be typed on client machine):$ ssh-keygen -R remote-server-name-here
Now login using the ssh command:$ ssh vivek@server1.cyberciti.biz
Conclusion
Ssh-keygen Solaris
You just regenerated OpenSSH Host Keys on a Debian or Ubuntu Linux using the dpkg-reconfigure command. For more info see the man page or this wiki page here:$ man dpkg-reconfigure
$ man sshd
Generate Ssh Key Github
ADVERTISEMENTS