Should you share SSH keys?
pub indicates that it is a public key which is fine to share with anyone managing a remote machine you want to access via ssh . The corresponding private key which should not be shared is id_rsa .
Can public SSH keys be shared?
While private keys should be kept secret by the authorized person wishing to gain access to a system, public keys may be freely shared. SSH keys are usually generated by a user entering a passphrase or other information. Typically, public and private keys will be generated from phrases of a few words.
Is SSH key safe?
SSH key authentication is much more secure. And when you’re transferring your sensitive files and data to the cloud, security is paramount. That’s why we use SSH keys as the default method of authentication for SFTP Gateway for AWS and SFTP Gateway for Azure.
Which SSH key is shared?
ssh between systems is fine so long as it’s limited to just files like authorized_keys , config , and known_hosts . If you want two hosts to be able to access each other, each host needs its own private SSH key, which must then be added to the other host’s authorized_keys file.
Is it OK to share a SSH key?
Just place the public key in the remote machine’s ~/.ssh/authorized_keys file for passwordless entry. Don’t share the private key though. The keys are just for authentication. You can log on as many times as you wish with the same key, so long as you can log on with that private key once.
Do you need private keys for two hosts?
If you want two hosts to be able to access each other, each host needs its own private SSH key, which must then be added to the other host’s authorized_keys file. It is not a good idea to copy private keys across systems! Think of real world secrets.
How to share a public SSH key in CentOS?
If you want to login from the first server, then send the public key of that server’s key, the one in the machines id_rsa.pub. If you want to login using both keys, you’ll need to arrange both in the authorized_keys on the target server.
How is the public key saved in SSH?
The SSH client connects to the server and advertises its preferred algorithm. The server sends the desired public key to the client, if it is supported. The client calculates the fingerprint of the public key. For the first connection, the public key is saved to known_hosts.