OpenSSH to deprecate SHA-1 logins due to security risk(zdnet.com)
zdnet.com
OpenSSH to deprecate SHA-1 logins due to security risk
https://www.zdnet.com/article/openssh-to-deprecate-sha-1-logins-due-to-security-risk/
https://www.zdnet.com/article/openssh-to-deprecate-sha-1-logins-due-to-security-risk/
To check whether a server is using the weak ssh-rsa public key algorithm, for host authentication, try to connect to it after removing the ssh-rsa algorithm from ssh(1)'s allowed list:
ssh -oHostKeyAlgorithms=-ssh-rsa user@host
If the host key verification fails and no other supported host key types are available, the server software on that host should be upgraded.