10. セキュリティ対策の重要性 システムのログイン認証ログ /var/log/secure 15:12:12 sshd[27259]: Failed password for bin from 69.94.125.45 port 35312 ssh2 15:12:12 sshd[27259]: Received disconnect from 69.94.125.45: 11: Bye Bye [preauth] 15:12:13 sshd[27266]: reverse mapping checking getaddrinfo for nyfishpix.nyfishpix.com [69.94.125.45] failed - POSSIBLE BREAK-IN ATTEMPT! 15:12:13 sshd[27266]: pam_unix(sshd:auth): authentic
