[O & M engineer _ 05] System Security Inspection tool-nmap

[Personnel in O & M gateway_05] System Security Inspection tool-nmap [Personnel in O & M gateway_04] System Security Inspection tool-nmaphttp: // www.bkjia.com/ OS /201304/200048.html in the United States blockbusters, Cui NIDI uses nmap to intrude into the energy management system of the power station in <>, without talking about hackers, Rocky stealing, and nmap to detect the security of their servers A good choice. If someone else's host is sniffed, it may be recorded by TCP_Wrappers and the IP address of the port has been detected, then this will take the case. In addition, nmap is very knowledgeable and interested. for more information, see the following: (1) use default parameters to scan the port [plain] [root @ Rocky ~] enabled on the local machine # Nmap localhost Starting Nmap 6.25 (http://nmap.org) at CST Nmap scan report for localhost (127.0.0.1) Host is up (0.000025 s latency ). rDNS record for 127.0.0.1: localhost. localdomain Not shown: 994 closed ports port state service 22/tcp open ssh 25/tcp open smtp 111/tcp open rpcbind 631/tcp open ipp 3306/tcp open mysql 5989/tcp open wbem-https Nmap done: 1 IP address (1 host up) scanned in 0.39 seconds STATE has 6 states: ① open: the port is open ② closed: the port is closed ③ filtered: the port is blocked by the firewall IDS/IPS, And the status cannot be determined. ④ unfiltered: the port is not blocked, but whether it is open requires further confirmation. ⑤ open | filtered: the port is open or blocked. ⑥ closed | filtered: the port is disabled or blocked. (2) analyze the TCP/UDP protocol nmap-sTU localhost (3) to obtain the nmap-sP 192.168.1 host that is alive in the working environment. *