Nmap Techniques

一些Nmap的技巧

来源：Tr4c3’s blog

by d3hydr8 > www.darkc0de.com

date: 01/20/08

Use nmap as a host discovery tool.

linuxbox:/home/d3hydr8 # nmap -sL 128.230.18.30-35 Starting Nmap 4.50 ( http://insecure.org ) at 2008-01-17 22:41 EST Host npropane.syr.edu (128.230.18.30) not scanned Host helpeiam1.syr.edu (128.230.18.31) not scanned Host tracker5-18.syr.edu (128.230.18.32) not scanned Host mirage2.syr.edu (128.230.18.33) not scanned Host backup01-18.syr.edu (128.230.18.34) not scanned Host cwis01.syr.edu (128.230.18.35) not scanned Nmap done: 6 IP addresses (0 hosts up) scanned in 6.628 seconds

Use nmap as a banner scanner, scan an ip range for open port 25

running Imail.

linuxbox:/home/d3hydr8 # nmap -sV 12.150.145.135-139 -p25 | grep IMail -B 3 Interesting ports on 138.145.static.conninc.com (12.150.145.138): PORT STATE SERVICE VERSION 25/tcp open smtp IMail NT-ESMTP 6.06 28262-4 -- Interesting ports on 139.145.static.conninc.com (12.150.145.139): 25/tcp open smtp IMail NT-ESMTP 6.06 28263-5

running Imail and send output to a file.

linuxbox:/home/d3hydr8 # nmap -sV 12.150.145.137-139 -p25 | grep IMail -B 3 >> nmap.txt linuxbox:/home/d3hydr8 # cat nmap.txt 25/tcp open smtp IMail NT-ESMTP 6.06 29384-6 25/tcp open smtp IMail NT-ESMTP 6.06 29385-7

Use the more intensive version check option.

linuxbox:/home/d3hydr8 # nmap -sV --version-all 128.230.18.35 -p 80 Starting Nmap 4.50 ( http://insecure.org ) at 2008-01-17 22:37 EST Interesting ports on cwis01.syr.edu (128.230.18.35): 80/tcp open http Apache httpd

Use nmap as a banner scanner, scan random ips for open port 21

running ProFTPD.

linuxbox:/home/d3hydr8 # nmap -sV -iR 1500 -p21 | grep ProFTPD -B 3 Starting Nmap 4.50 ( http://insecure.org ) at 2008-01-17 17:41 EST Interesting ports on www.buford-thompson.net (161.58.19.143): 21/tcp open ftp ProFTPD

Use nmap to scan an ip address and get (guess) the OS being used.

linuxbox:/home/d3hydr8 # nmap -PN -O --osscan-limit 38.117.198.214 | grep Running Running (JUST GUESSING) : ZyXEL ZyNOS (96%)

Using nmap for a traceroute, finds an open port and counts the hops.

linuxbox:/home/d3hydr8 # nmap --traceroute 128.230.18.35 Starting Nmap 4.50 ( http://insecure.org ) at 2008-01-17 22:27 EST Not shown: 1656 closed ports, 49 filtered ports PORT STATE SERVICE 80/tcp open http TRACEROUTE (using port 80/tcp) HOP RTT ADDRESS 1 2.89 192.168.1.1 2 12.18 10.114.0.1 3 9.52 172.22.5.13 4 12.33 172.22.5.69 5 10.86 172.22.33.73 6 12.48 172.22.32.106 7 15.21 12.86.87.29 8 41.73 tbr2.attga.ip.att.net (12.122.96.74) 9 41.78 tbr1.dlstx.ip.att.net (12.122.2.89) 10 73.50 ggr3.dlstx.ip.att.net (12.123.16.201) 11 42.87 br2-a3120s2.attga.ip.att.net (192.205.33.206) 12 66.36 66.192.240.226 13 74.74 64-132-176-170.static.twtelecom.net (64.132.176.170) 14 77.85 128.230.61.1 15 74.08 c6509r-srv.syr.edu (128.230.61.58) 16 73.36 cwis01.syr.edu (128.230.18.35) Nmap done: 1 IP address (1 host up) scanned in 111.295 seconds

Use nmap to test the reason why a port is in a specific state.

linuxbox:/home/d3hydr8 # nmap --reason 128.230.18.35 -p 21 Starting Nmap 4.50 ( http://insecure.org ) at 2008-01-17 22:31 EST PORT STATE SERVICE REASON 21/tcp filtered ftp no-response Nmap done: 1 IP address (1 host up) scanned in 1.247 seconds

Use nmap with a spoofed MAC address.

linuxbox:/home/d3hydr8 # nmap --spoof-mac 08:00:69:02:01:FC -iR 3 Starting Nmap 4.50 ( http://insecure.org ) at 2008-01-17 22:51 EST Spoofing MAC address 08:00:69:02:01:FC (Silicon Graphics) Nmap done: 3 IP addresses (0 hosts up) scanned in 3.387 seconds

Use nmap with cloaked decoys. You can use my script for creating a list of ips to use. http://www.darkc0de.com/misc/ipgen1.1.py

linuxbox:/home/d3hydr8 # nmap -D 198.162.1.100,198.162.1.101 -iR 3 Starting Nmap 4.50 ( http://insecure.org ) at 2008-01-17 23:22 EST Nmap done: 3 IP addresses (0 hosts up) scanned in 3.082 seconds