Hardening Checklist

  • Telnet -> OpenSSH (latest patches)
  • SSH Server: Protocol 2, do not allow root login
  • SSH Client: Protocol 2
  • Prevent root login (su/sudo only)
  • Install ossec: http://www.ossec.net
  • Confirm needed services in xinetd / inetd
  • Confirm runlevel is multi-user mode and not starting X by default
  • Review banners: motd, /etc/issue, sshd, ftpd, httpd…
  • Restrict access to system logs
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