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안녕하세요? 요즘 열심히 서버 세팅을 하고 있는 넘입니다. 이 서버는 웹서버, 메일서버,그리고 ftp 서버로 사용할 것이며 그 외의 의도로는 아직 고려하지 않고 있습니다. 서버를 관리하면서 보안이라는 문제를 생각하지 않을 수 없는데요... 저는 기본적으로 '잘 모르면 아예 막아버리자'파입니다. 제가 제 서버에 NMAP 라는 프로그램으로 스캔한 결과를 보여드릴께요.. 혹시 이걸 보시고 제가 취할 수 있는 것이 뭔지 말씀해 주세요... nmap 옵션으론 '-sS -O -v' 를 줬고, IP는 숨겼습니다.^^ 그럼, 고맙습니다. ----------------------------------------- Starting nmap V. 2.53 by fyodor@insecure.org ( www.insecure.org/nmap/ ) Host (xxx.xxx.xxx.xxx) appears to be up ... good. Initiating SYN half-open stealth scan against (xxx.xxx.xxx.xxx) Adding TCP port 1024 (state open). Adding TCP port 110 (state open). Adding TCP port 113 (state open). Adding TCP port 1032 (state open). Adding TCP port 80 (state open). Adding TCP port 3306 (state open). Adding TCP port 111 (state open). Adding TCP port 25 (state open). Adding TCP port 1030 (state open). Adding TCP port 587 (state open). Adding TCP port 1017 (state open). Adding TCP port 21 (state open). Adding TCP port 6000 (state open). Adding TCP port 98 (state open). Adding TCP port 143 (state open). Adding TCP port 109 (state open). The SYN scan took 0 seconds to scan 1523 ports. For OSScan assuming that port 21 is open and port 1 is closed and neither are firewalled Interesting ports on (xxx.xxx.xxx.xxx): (The 1507 ports scanned but not shown below are in state: closed) Port State Service 21/tcp open ftp 25/tcp open smtp 80/tcp open http 98/tcp open linuxconf 109/tcp open pop-2 110/tcp open pop-3 111/tcp open sunrpc 113/tcp open auth 143/tcp open imap2 587/tcp open submission 1017/tcp open unknown 1024/tcp open kdm 1030/tcp open iad1 1032/tcp open iad3 3306/tcp open mysql 6000/tcp open X11 TCP Sequence Prediction: Class=random positive increments Difficulty=1559643 (Good luck!) Sequence numbers: E48843B5 E459DE8F E436C6E1 E4497C89 E4A350C3 E4DB300A Remote operating system guess: Linux 2.1.122 - 2.2.14 Nmap run completed -- 1 IP address (1 host up) scanned in 3 seconds--멋진 .......
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