May 2017
Intermediate to advanced
416 pages
21h 33m
English
Content preview from Nmap: Network Exploration and Security Auditing Cookbook - Second Edition
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How to do it...
- To perform a full port scan with the timing template set to aggressive, and without the reverse DNS resolution (-n) or ping (-Pn), use the following command:
# nmap -T4 -n -Pn -p- 74.207.244.221
- Note the scanning time at the end of the report:
Nmap scan report for 74.207.244.221 Host is up (0.11s latency). Not shown: 65532 closed ports PORT STATE SERVICE 22/tcp open ssh 80/tcp open http 9929/tcpopen nping-echo Nmap done: 1 IP address (1 host up) scanned in 60.84 seconds
- Now, compare the running time that we get if we don't skip any tests:
# nmap -p- scanme.nmap.org Nmap scan report for scanme.nmap.org (74.207.244.221) Host is up (0.11s latency). Not shown: 65532 closed ports PORT STATE SERVICE 22/tcp ...
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