在这个例子让我们看看网站http://www.example.com来获得很多信息我们可以对爱丽丝。从网站上,我们也发现爱丽丝运行foobar.org。我们在www example.com输入提示的名称查找窗口工具,和我们的结果是这个IP地址:192.173.28.130我们域输入名称查询提示和我们有相同的IP。我们可以安全地说例子和foobar.org驻留在相同的盒子。但如果我们做反向名称查找IP,哪些领域会出现?www.example.com或foobar.org ?没有,结果是nijasvspirates.org。因此nijasvspirates.org的名称框举办31337 squirrel.org和foobar.org。现在我们的IP,让我们看看nijasvspirates是醒着的。我们在Ping IP输入提示窗口。 We'll set the interval between packets to 1 millisecond. We'll set the number of seconds to wait until a ping times out to 5. We'll set the ping size to 500 bytes and we'll send ten pings. Ten packets sent and ten packets received. nijasvspirates.org returned a message to my computer within an average of 0.35 seconds for every packet sent. nijasvspirates is alive. We open the Whois window and type nijasvspirates.org into the Query prompt, and whois.networksolutions.com into the Server prompt. This means we'll be asking Network Solutions to tell us everything they know about nijasvspirates.org. The result is this laundry list of info: Registrant: FooBar (nijasvspirates -DOM) p.o.box 11111 SLC, UT 84151 US Domain Name: nijasvspirates.ORG Administrative Contact, Billing Contact: Smith, John jsmith@anonymous.net FooBar p.o.box 11111 SLC, UT 84151 555-555-6103 Technical Contact: Johnson, Ken kj@fierymonkey.org fierymonkey p.o.box 11111 SLC, UT 84151 555-555-3849 Record last updated on 17-Aug-2001. Record expires on 11-Aug-2002. Record created on 11-Aug-2000. Database last updated on 12-Dec-2001 04:06:00 EST. Domain servers in listed order: NS1. fierymonkey.ORG 192.173.28.130 NS2. fierymonkey.ORG 64.192.168.80 A corner stone of footprinting is Port Scanning. Let's port scan nijasvspirates.org and see what kind of services are running on that box. We type in the nijasvspirates IP into the Host prompt of the Port Scan window. We'll start searching from port number 1, and we'll stop at the default Sub7 port, 27374. Our results are: 21 TCP ftp 22 TCP ssh SSH-1.99-OpenSSH_2.30 25 TCP smtp 53 TCP domain 80 TCP www 110 TCP pop3 111 TCP sunrpc 113 TCP ident Just by this we know that Alice is running a website and email, using POP3, SUNRPC (SUN Remote Procedure Call), and ident.