To minimize the possibility of malicious attacks, maintain critical SSH key file permissions on your virtual appliance host machines.
See Also
Accessing UNIX server using PuTTY (SSH) | Information Technology and Computing SupportSSH, The Secure Shell: The Definitive Guide, 2nd EditionHow to convert RSA Private Key to Putty Private Key .ppk - KnowledgebaseHow to start a SSH session from the command line
Kualo Limited
Procedure
- Check the SSH public key files by running the following command: #ls -al /etc/ssh/*pub
- Verify that the files have the following permissions.
-rw-r--r-- 1 root root 609 date and time /etc/ssh/ssh_host_dsa_key.pub-rw-r--r-- 1 root root 181 date and time /etc/ssh/ssh_host_ecdsa_key.pub-rw-r--r-- 1 root root 101 date and time /etc/ssh/ssh_host_ed25519_key.pub-rw-r--r-- 1 root root 401 date and time /etc/ssh/ssh_host_rsa_key.pub
- Check the SSH private key files by running the following command: ls -al /etc/ssh/*key
- Verify that the files have the following permissions.
-rw------- 1 root root 668 date and time /etc/ssh/ssh_host_dsa_key-rw------- 1 root root 227 date and time /etc/ssh/ssh_host_ecdsa_key-rw------- 1 root root 411 date and time /etc/ssh/ssh_host_ed25519_key-rw------- 1 root root 1679 date and time /etc/ssh/ssh_host_rsa_key
- Check the SSH configuration files by running the following command: #lls -al /etc/ssh/*config
- Verify that the files have the following permissions.
-rw-r--r-- 1 root root 1914 date and time /etc/ssh/ssh_config-rw------- 1 root root 3481 date and time /etc/ssh/sshd_config
