Options which take are in seconds, or append 'ms' (milliseconds), osscan-guess: Guess OS more aggressively osscan-limit: Limit OS detection to promising targets
script-updatedb: Update the script database. script-trace: Show all data sent and received script-args=: provide arguments to scripts version-trace: Show detailed version scan activity (for debugging)ĭirectories, script-files or script-categories
version-all: Try every single probe (intensity 9) version-light: Limit to most likely probes (intensity 2) version-intensity : Set from 0 (light) to 9 (try all probes) sV: Probe open ports to determine service/version info port-ratio : Scan ports more common than r: Scan ports consecutively - don't randomize F: Fast mode - Scan fewer ports than the default scan dns-servers : Specify custom DNS servers n/-R: Never do DNS resolution/Always resolve PE/PP/PM: ICMP echo, timestamp, and netmask request discovery probes PS/PA/PU/PY: TCP SYN/ACK, UDP or SCTP discovery to given ports Pn: Treat all hosts as online - skip host discovery sL: List Scan - simply list targets to scan You can type nmap -h for the help menu, there you can see all of the scan types and options.
You have to install it in the windows to make it work. If you want to know about what are ports and some basic of network hacking, I will recommend you this article. It uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. Nmap (“Network Mapper”) is a free and open-source utility for network discovery and security auditing. It is the most popular free security scanner developed by Gordon Lyon (f.f. Nmap is is a very popular Network mapping tool used to scan the networks for open ports and vulnerabilities. Before talking about NSE scripts, we’ve to understand what is Nmap and how it works? What is Nmap?