nmap 도움말

가장 간단한 사용법은
nmap ip (1개의 아이피에 대해 1000개의 포트스캔)

조금 복잡한 사용법은
nmap -p 1-65535 ip (1개의 아이피에 대해 모든 포트스캔)

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[:probeport]>: 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