脚印拓取，或译为足迹搜集（Footprinting），俗称“踩点”。是黑客入侵预定目标如服务器检测目标有何漏洞搜集有用信息资讯再最终制定入侵方案的方法之一，另一种一般为扫描。

可以在域名机构网站如apnic查询到一些域名注册者所有者的社会信息，黑客利用这些信息为入侵提供方便

Whois search还可以查询到IP的注册公司信息

Footprinting is the technique of gathering information about computer systems and the entities they belong to. This is done by employing various computer security techniques, as:

When used in the computer security lexicon, "Footprinting" generally refers to one of the pre-attack phases; tasks performed prior to doing the actual attack. Some of the tools used for footprinting are Sam Spade, nslookup, traceroute, Nmap and neotrace.