요약
nmap 192.168.0.100
이슈
방치되어있던 시놀로지 나스의 포트번호가 기억나지 않아 전체 포트를 스캔해야하는 상황이 발생했고 tcping [example.com] [port] 명령어로는 65535 번 반복해서 조회를 해야했기 때문에 다른 명령어를 찾아보게 되었다.
해결
nmap 설치
# MacOS
brew install nmap
# ubuntu
sudo apt-get install nmap
# centOS
sudo yum install nmap
# windows 는 https://nmap.org/download.html 여기서 다운로드사용 방법
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전체 TCP 포트 스캔
$ nmap 10.10.98.42 Starting Nmap 7.94 ( https://nmap.org ) at 2023-07-19 08:55 KST Nmap scan report for 10.10.98.42 Host is up (0.00019s latency). Not shown: 988 closed tcp ports (conn-refused) PORT STATE SERVICE 80/tcp open http 443/tcp open https 548/tcp open afp 873/tcp open rsync 3000/tcp open ppp 3001/tcp open nessus 3261/tcp open winshadow 5566/tcp open westec-connect 50001/tcp open unknown 50002/tcp open iiimsf -
전체 UDP 포트 스캔
udp 포트 스캔을 위해서는 sudo 권한이 필요하다.$ sudo nmap -sU 10.10.98.42 Password: Starting Nmap 7.94 ( https://nmap.org ) at 2023-07-19 09:11 KST Nmap scan report for 10.10.98.42 Host is up (0.00057s latency). Not shown: 994 closed udp ports (port-unreach) PORT STATE SERVICE 68/udp open|filtered dhcpc 123/udp open ntp 137/udp open netbios-ns 138/udp open|filtered netbios-dgm 1900/udp open upnp 5353/udp open zeroconf MAC Address: 00:00:00:00:00:00 (Synology Incorporated) Nmap done: 1 IP address (1 host up) scanned in 1086.98 seconds -
특정 포트 스캔
$ nmap 10.10.98.42 -p80 Starting Nmap 7.94 ( https://nmap.org ) at 2023-07-19 09:16 KST Nmap scan report for 10.10.98.42 Host is up (0.0044s latency). PORT STATE SERVICE 80/tcp open http Nmap done: 1 IP address (1 host up) scanned in 0.13 seconds