“ssh_host_*_key” is 600.
# ls -lh /etc/ssh/ssh_host_* -rw-------. 1 root root 668 Feb 23 18:35 /etc/ssh/ssh_host_dsa_key -rw-r--r--. 1 root root 590 Feb 23 18:35 /etc/ssh/ssh_host_dsa_key.pub -rw-------. 1 root root 963 Feb 23 18:35 /etc/ssh/ssh_host_key -rw-r--r--. 1 root root 627 Feb 23 18:35 /etc/ssh/ssh_host_key.pub -rw-------. 1 root root 1.7K Feb 23 18:35 /etc/ssh/ssh_host_rsa_key -rw-r--r--. 1 root root 382 Feb 23 18:35 /etc/ssh/ssh_host_rsa_key.pub #
copy /etc/ssh/ssh_host_* from old server to new server for VIP access with Act/Std, for server replace
# ssh old-server ls -l /etc/ssh/ssh_host* # scp -p old-server:/tmp/ssh_host* /tmp/ # ls -l /etc/ssh/ssh_host* # mkdir /tmp/ssh_host_org/ # cp -p /etc/ssh/ssh_host* /tmp/ssh_host_org/ # cp -p /tmp/ssh_host* /etc/ssh/ # ls -lh /etc/ssh/ssh_host* # systemctl restart sshd <- [Old Linux] /etc/init.d/sshd restart