TARGET SPECIFICATION: Can pass hostnames, IP addresses, networks, etc. Ex: scanme.nmap.org, microsoft.com/24, 192.168.0.1; 10.0.0-255.1-254 ★★★★ -iL <inputfilename>: Input from list of hosts/networks -iR <num hosts>: Choose random targets --exclude <host1[,host2][,host3],...>: Exclude hosts/networks --excludefile <exclude_file>: Exclude list from file
HOST DISCOVERY: -sL: List Scan - simply list targets to scan ★★★★ -sn: Ping Scan - disable port scan -Pn: Treat all hosts as online -- skip host discovery -PS/PA/PU/PY[portlist]: TCP SYN/ACK, UDP or SCTP discovery to given ports ★★★★ -PE/PP/PM: ICMP echo, timestamp, and netmask request discovery probes -PO[protocol list]: IP Protocol Ping -PR: ARP ping - does not need HW address -> IP translation ★★★★ -n/-R: Never do DNS resolution/Always resolve [default: sometimes] --dns-servers <serv1[,serv2],...>: Specify custom DNS servers --system-dns: Use OS's DNS resolver --traceroute: Trace hop path to each host
PORT SPECIFICATION AND SCAN ORDER: ★★★★ -p <port ranges>: Only scan specified ports Ex: -p22; -p1-65535; -p U:53,111,137,T:21-25,80,139,8080,S:9 -F: Fast mode - Scan fewer ports than the default scan -r: Scan ports consecutively - don't randomize --top-ports <number>: Scan <number> most common ports --port-ratio <ratio>: Scan ports more common than <ratio>
SERVICE/VERSION DETECTION: -sV: Probe open ports to determine service/version info -sR: Check what service uses opened ports using RPC scan --version-intensity <level>: Set from 0 (light) to 9 (try all probes) --version-light: Limit to most likely probes (intensity 2) --version-all: Try every single probe (intensity 9) --version-trace: Show detailed version scan activity (for debugging)
SCRIPT SCAN: -sC: equivalent to --script=default --script=<Lua scripts>: <Lua scripts> is a comma separated list of directories, script-files or script-categories --script-args=<n1=v1,[n2=v2,...]>: provide arguments to scripts --script-trace: Show all data sent and received --script-updatedb: Update the script database.
OS DETECTION: -O: Enable OS detection --osscan-limit: Limit OS detection to promising targets --osscan-guess: Guess OS more aggressively
TIMING AND PERFORMANCE: Options which take <time> are in seconds, or append 'ms' (milliseconds), 's' (seconds), 'm' (minutes), or 'h' (hours) to the value (e.g. 30m). -T<0-5>: Set timing template (higher is faster) ★★★★ --min-hostgroup/max-hostgroup <size>: Parallel host scan group sizes ★★★★ --min-parallelism/max-parallelism <numprobes>: Probe parallelization --min-rtt-timeout/max-rtt-timeout/initial-rtt-timeout <time>: Specifies probe round trip time. --max-retries <tries>: Caps number of port scan probe retransmissions. --host-timeout <time>: Give up on target after this long --scan-delay/--max-scan-delay <time>: Adjust delay between probes --min-rate <number>: Send packets no slower than <number> per second --max-rate <number>: Send packets no faster than <number> per second
FIREWALL/IDS EVASION AND SPOOFING: -f; --mtu <val>: fragment packets (optionally w/given MTU) -D <decoy1,decoy2[,ME],...>: Cloak a scan with decoys ★★★★ -S <IP_Address>: Spoof source address -e <iface>: Use specified interface -g/--source-port <portnum>: Use given port number --data-length <num>: Append random data to sent packets --ip-options <options>: Send packets with specified ip options --ttl <val>: Set IP time-to-live field --spoof-mac <mac address/prefix/vendor name>: Spoof your MAC address --badsum: Send packets with a bogus TCP/UDP/SCTP checksum
OUTPUT: ★★★★ -oN/-oX/-oS/-oG <file>: Output scan in normal, XML, s|<rIpt kIddi3, and Grepable format, respectively, to the given filename. -oA <basename>: Output in the three major formats at once ★★★★ -v: Increase verbosity level (use -vv or more for greater effect) -d: Increase debugging level (use -dd or more for greater effect) --reason: Display the reason a port is in a particular state --open: Only show open (or possibly open) ports --packet-trace: Show all packets sent and received --iflist: Print host interfaces and routes (for debugging) --log-errors: Log errors/warnings to the normal-format output file --append-output: Append to rather than clobber specified output files --resume <filename>: Resume an aborted scan --stylesheet <path/URL>: XSL stylesheet to transform XML output to HTML --webxml: Reference stylesheet from Nmap.Org for more portable XML --no-stylesheet: Prevent associating of XSL stylesheet w/XML output
MISC: -6: Enable IPv6 scanning -A: Enable OS detection, version detection, script scanning, and traceroute --datadir <dirname>: Specify custom Nmap data file location --send-eth/--send-ip: Send using raw ethernet frames or IP packets --privileged: Assume that the user is fully privileged --unprivileged: Assume the user lacks raw socket privileges -V: Print version number -h: Print this help summary page.
Starting Nmap 6.40 ( http://nmap.org ) at 2017-06-20 13:03 CST Nmap scan report for localhost (127.0.0.1) Host is up (0.0000010s latency). Not shown: 998 closed ports PORT STATE SERVICE 22/tcp open ssh 25/tcp open smtp
[root@server2 ~]# nmap 192.168.0.122 Starting Nmap 6.40 ( http://nmap.org ) at 2017-06-20 13:11 CST Nmap scan report for 192.168.0.122 Host is up (1.2s latency). Not shown: 990 closed ports PORT STATE SERVICE 21/tcp open ftp 135/tcp open msrpc 139/tcp open netbios-ssn 443/tcp open https 445/tcp open microsoft-ds 514/tcp filtered shell 902/tcp open iss-realsecure 912/tcp open apex-mesh 1583/tcp open simbaexpress 5357/tcp open wsdapi Nmap done: 1 IP address (1 host up) scanned in 8.38 seconds
[root@xuexi ~]# nmap 192.168.100.1/24 Starting Nmap 6.40 ( http://nmap.org ) at 2017-06-20 13:22 CST Nmap scan report for 192.168.100.1 Host is up (0.00053s latency). Not shown: 992 filtered ports PORT STATE SERVICE 21/tcp open ftp 135/tcp open msrpc 139/tcp open netbios-ssn 443/tcp open https 445/tcp open microsoft-ds 902/tcp open iss-realsecure 912/tcp open apex-mesh 5357/tcp open wsdapi MAC Address: 00:50:56:C0:00:08 (VMware) Nmap scan report for 192.168.100.2 Host is up (0.000018s latency). Not shown: 999 closed ports PORT STATE SERVICE 53/tcp open domain MAC Address: 00:50:56:E2:16:04 (VMware)
Nmap scan report for 192.168.100.70 Host is up (0.00014s latency). Not shown: 999 closed ports PORT STATE SERVICE 22/tcp open ssh MAC Address: 00:0C:29:71:81:64 (VMware)
Nmap scan report for 192.168.100.254 Host is up (0.000095s latency). All 1000 scanned ports on 192.168.100.254 are filtered MAC Address: 00:50:56:ED:A1:04 (VMware)
Nmap scan report for 192.168.100.62 Host is up (0.0000030s latency). Not shown: 999 closed ports PORT STATE SERVICE 22/tcp open ssh
Nmap done: 256 IP addresses (5 hosts up) scanned in 7.96 seconds
TIMING AND PERFORMANCE: ★★★★ -T<0-5>: Set timing template (higher is faster) ★★★★ --min-hostgroup/max-hostgroup <size>: Parallel host scan group sizes ★★★★ --min-parallelism/max-parallelism <numprobes>: Probe parallelization --min-rtt-timeout/max-rtt-timeout/initial-rtt-timeout <time>: Specifies probe round trip time. --max-retries <tries>: Caps number of port scan probe retransmissions. --host-timeout <time>: Give up on target after this long --scan-delay/--max-scan-delay <time>: Adjust delay between probes --min-rate <number>: Send packets no slower than <number> per second --max-rate <number>: Send packets no faster than <number> per second
C:\Windows\system32>nmap -O 127.0.0.1 Starting Nmap 7.40 ( https://nmap.org ) at 2017-03-09 13:18 CST Nmap scan report for lmlicenses.wip4.adobe.com (127.0.0.1) Host is up (0.000046s latency). Not shown: 990 closed ports PORT STATE SERVICE 21/tcp open ftp 135/tcp open msrpc 443/tcp open https 445/tcp open microsoft-ds 902/tcp open iss-realsecure 912/tcp open apex-mesh 5357/tcp open wsdapi 5678/tcp open rrac 10000/tcp open snet-sensor-mgmt 65000/tcp open unknown Device type: general purpose Running: Microsoft Windows 10 OS CPE: cpe:/o:microsoft:windows_10 OS details: Microsoft Windows 10 1511 Network Distance: 0 hops OS detection performed. Please report any incorrect results at https://nmap.org/submit/ . Nmap done: 1 IP address (1 host up) scanned in 2.33 seconds
Warning: You specified a highly aggressive --min-hostgroup. Warning: Your --min-parallelism option is pretty high! This can hurt reliability.
Starting Nmap 6.40 ( http://nmap.org ) at 2017-06-20 14:30 CST Nmap scan report for 192.168.100.1 Host is up (0.00036s latency). MAC Address: 00:50:56:C0:00:08 (VMware) Nmap scan report for 192.168.100.2 Host is up (0.000051s latency). MAC Address: 00:50:56:E2:16:04 (VMware) Nmap scan report for 192.168.100.70 Host is up (0.000060s latency). MAC Address: 00:0C:29:71:81:64 (VMware) Nmap scan report for 192.168.100.254 Host is up (0.000069s latency). MAC Address: 00:50:56:ED:A1:04 (VMware) Nmap scan report for 192.168.100.62 Host is up. Nmap done: 256 IP addresses (5 hosts up) scanned in 0.26 seconds
Warning: You specified a highly aggressive --min-hostgroup. Warning: Your --min-parallelism option is pretty high! This can hurt reliability.
Starting Nmap 6.40 ( http://nmap.org ) at 2017-06-20 14:52 CST Nmap scan report for 192.168.100.1 Host is up (0.00084s latency). Not shown: 1980 filtered ports PORT STATE SERVICE 21/tcp open ftp MAC Address: 00:50:56:C0:00:08 (VMware)
Nmap scan report for 192.168.100.2 Host is up (0.000018s latency). Not shown: 1980 closed ports PORT STATE SERVICE 53/tcp open domain MAC Address: 00:50:56:E2:16:04 (VMware) Nmap scan report for 192.168.100.70 Host is up (0.000041s latency). Not shown: 1980 closed ports PORT STATE SERVICE 22/tcp open ssh MAC Address: 00:0C:29:71:81:64 (VMware)
Nmap scan report for 192.168.100.254 Host is up (0.000035s latency). All 1981 scanned ports on 192.168.100.254 are filtered MAC Address: 00:50:56:ED:A1:04 (VMware)
Nmap scan report for 192.168.100.62 Host is up (0.0000020s latency). Not shown: 1980 closed ports PORT STATE SERVICE 22/tcp open ssh
Nmap done: 256 IP addresses (5 hosts up) scanned in 2.38 seconds
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