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Nmap 5.21 ( http://nmap.org )

Usage: nmap [Scan Type(s)] [Options] {target specification}

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

-sP: Ping Scan - go no further than determining if host is online

-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

-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

SCAN TECHNIQUES:

-sS/sT/sA/sW/sM: TCP SYN/Connect()/ACK/Window/Maimon scans

-sU: UDP Scan

-sN/sF/sX: TCP Null, FIN, and Xmas scans

--scanflags <flags>: Customize TCP scan flags

-sI <zombie host[robeport]>: Idle scan

-sY/sZ: SCTP INIT/COOKIE-ECHO scans

-sO: IP protocol scan

-b <FTP relay host>: FTP bounce scan

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

-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

--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 milliseconds, unless you append '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 <time>: 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

--adler32: Use deprecated Adler32 instead of CRC32C for SCTP checksums

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 twice or more for greater effect)

-d[level]: Set or increase debugging level (Up to 9 is meaningful)

--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: Enables OS detection and 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.

EXAMPLES:

nmap -v -A scanme.nmap.org

nmap -v -sP 192.168.0.0/16 10.0.0.0/8

nmap -v -iR 10000 -PN -p 80

SEE THE MAN PAGE (http://nmap.org/book/man.html) FOR MORE OPTIONS AND EXAMPLES

nmap: option `-l' is ambiguous