After installing or upgrading Analytics Server, reconfigure SSH server to use the strong MAC algorithms.
You can identify the available MAC algorithms by using the sudo sshd -T |grep mac command. The MD5 or 96-bit MAC algorithms are considered as weak algorithms. Hence, you must remove the weak algorithms.
The OpenSSH suite consists of the following tools: Remote operations are done using ssh, scp, and sftp. Key management with ssh-add, ssh-keysign, ssh-keyscan, and ssh-keygen. The service side consists of sshd, sftp-server, and ssh-agent. OpenSSH is developed by a few developers of the OpenBSD Project and made available under a BSD-style license. The operating systems or virtual machines the SSH servers are designed to run on without emulation; there are several possibilities:. No indicates that it does not exist or was never released.; Partial indicates that while it works, the server lacks important functionality compared to versions for other OSs but may still be under development.; Beta indicates that while a version is. $ ssh -Q mac # output would be something like hmac-sha1 hmac-sha1-96 hmac-sha2-256 hmac-sha2-512 hmac-md5 hmac-md5-96 [email protected][email protected] So now in order to connect to target server with their choice of mac which your server doesn't support you have to explicitly provide one of the mac supported by target server. 6.3 Disabling Weak MAC Algorithms on a Secure Shell Server. After installing or upgrading Analytics Server, reconfigure SSH server to use the strong MAC algorithms. You can identify the available MAC algorithms by using the sudo sshd -T grep mac command. The MD5 or 96-bit MAC algorithms are considered as weak algorithms.
Openssh Client
Log into Analytics Server with root credentials.
Open the /etc/ssh/sshd_config file and search for macs.
Remove the weak MAC algorithms that are mentioned in the file.
The entry will be similar to the following line and can include additional strong MAC algorithms:
Save the file.
Restart the sshd service by using the service sshd restart command.
Launch a new SSH session before closing the existing session.
Live share grundig download. This verifies the connection and you can log in to the server with the root account.