min-rtt-timeout / max-rtt-timeout / initial-rtt-timeout : Specifies min-parallelism / max-parallelism : Probe parallelization min-hostgroup / max-hostgroup : Parallel host scan group sizes T : Set timing template (higher is faster) 's' (seconds),'m' (minutes), or'h' (hours) to the value (eg 30m). Options which take are in seconds, or append'ms' (milliseconds), osscan-guess: Guess OS more aggressively osscan-limit: Limit OS detection to promising targets is a comma separted list of script-files or

script-help = : Show help about scripts. script-updatedb: Update the script database. script-trace: Show all data sent and received script-args-file = filename: provide NSE script args in a file script-args = : provide arguments to scripts script = : is a comma separated list ofĭirectories, script-files or script-categories version-trace: Show detailed version scan activity (for debugging) 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

sS / sT / sA / sW / sM: TCP SYN / Connect () / ACK / Window / Maimon scans 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 iL : Input from list of hosts / networks # yum -y install nmapĬompiled with: nmap-liblua-5.2.2 openssl-1.0.2k libpcre-8.32 libpcap-1.5.3 nmap-libdnet-1.12 ipv6Īvailable nsock engines: epoll poll selectĤ Option list # nmap -help The hosts file has the following contents for both client and server. The OS version of the virtual machine for both client and server is as follows. I used two virtual machines on VMware Workstation 16 Player. Network administrators use Nmap to identify what devices are running on their systems, discovering hosts that are available and the services they offer, finding open ports and detecting security risks. Nmap, short for Network Mapper, is a free, open-source tool for vulnerability scanning and network discovery.

What is zenmap used for