How do i use nmap to scan all 65535 ports?
saolasosme last edited by
Quote from the nmap man page:
While Nmap is commonly used for security audits, many systems and network administrators find it useful for routine tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime.
-p port ranges (Only scan specified ports) . This option specifies which ports you want to scan and overrides the default. Individual port numbers are OK, as are ranges separated by a hyphen (e.g. 1-1023). The beginning and/or end values of a range may be omitted, causing Nmap to use 1 and 65535, respectively. So you can specify -p- to scan ports from 1 through 65535. Scanning port zero. is allowed if you specify it explicitly. For IP protocol scanning (-sO), this option specifies the protocol numbers you wish to scan for (0–255).
$ nmap -p- localhost Starting Nmap 6.40 ( http://nmap.org ) at 2017-03-12 09:34 BST Nmap scan report for localhost (127.0.0.1) Host is up (0.00049s latency). Other addresses for localhost (not scanned): 127.0.0.1 Not shown: 65530 closed ports PORT STATE SERVICE 22/tcp open ssh 25/tcp open smtp 111/tcp open rpcbind 631/tcp open ipp 37328/tcp open unknown Nmap done: 1 IP address (1 host up) scanned in 2.41 seconds
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