OpenSSH's security mechanisms, particularly Privilege Separation and Sandboxing, have gained attention due to the recent CVE-2023-25136 vulnerability. These mechanisms, implemented to enhance SSH server security, have been operational for over two decades but were not widely recognized until now. Privilege Separation splits the server process into privileged and unprivileged processes, with the latter managing user authentication to prevent pre-authentication attacks from compromising the root account. The Sandbox feature, introduced in OpenSSH version 5.9, restricts system call access to create a controlled environment for pre-authentication processes, limiting potential vulnerabilities. These layers of security reduce the attack surface and prevent privilege escalation attacks, although user configuration can weaken these defenses if not properly maintained. The blog post underscores the importance of maintaining default security settings and staying updated with the latest OpenSSH versions to mitigate risks effectively.