《Nmap渗透测试指南》—第2章2.11节禁止反向域名解析

本节书摘来自异步社区《Nmap渗透测试指南》一书中的第2章2.11节禁止反向域名解析，作者 商广明,更多章节内容可以访问云栖社区“异步社区”公众号查看。

2.11　禁止反向域名解析表2.10所示为本章节所需Nmap命令表，表中加粗命令为本小节所需命令——禁止DNS反向解析。

-n选项意为禁止解析域名，使用该选项的时候Nmap永远不对目标IP地址作反向域名解析。

root@Wing:~# nmap -n -sL 124.172.156.75/24 Starting Nmap 6.40 ( http://nmap.org ) at 2014-06-09 21:30 CST Nmap scan report for 124.172.156.0 Nmap scan report for 124.172.156.1 Nmap scan report for 124.172.156.2 Nmap scan report for 124.172.156.3 Nmap scan report for 124.172.156.4 …省略… Nmap scan report for 124.172.156.240 Nmap scan report for 124.172.156.241 Nmap scan report for 124.172.156.242 Nmap scan report for 124.172.156.243 Nmap scan report for 124.172.156.244 Nmap scan report for 124.172.156.245 Nmap scan report for 124.172.156.246 Nmap scan report for 124.172.156.247 Nmap scan report for 124.172.156.248 Nmap scan report for 124.172.156.249 Nmap scan report for 124.172.156.250 Nmap scan report for 124.172.156.251 Nmap scan report for 124.172.156.252 Nmap scan report for 124.172.156.253 Nmap scan report for 124.172.156.254 Nmap scan report for 124.172.156.255 Nmap done: 256 IP addresses (0 hosts up) scanned in 0.02 seconds root@Wing:~#

　该选项很少使用，如果是对一台有域名绑定的服务器通常不会使用该选项；如果是单纯扫描一段IP，使用该选项可以大幅度减少目标主机的相应时间，从而更快地得到结果。