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Intelligence gathering is not a new topic, people of every era used to gather intelligence using their own techniques, now the techniques have been evolved, and we have ‘new’ way of searching the information. War dialing is not dead, it evolved and changed its shape (think of the random port scanning).The World Wide Web is not the entire Internet you should search the Internet for the information.Open source intelligence is a continuous process and organizations should adopt it like this.So the important points to conclude here: Think about the quick port scan against any technology infrastructure you scan for the devices, not the web pages.
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The Internet is the network of different networks it is an umbrella of the connected devices (computers, printers, routers, switches, servers, etc.) Think of the shodan it does not search web pages, whatever the devices. It makes open source intelligence a continuous process World Wide Web is not the Internet. You always find the information you are looking for on the Internet, but it changes so the accuracy can’t be measured. The second reason can be drawn from the size of the Internet it is huge, and you can’t claim that you have scanned every corner and provided the correct information with the accuracy. Internet changes constantly, it changes within a fraction of seconds, while you are reading this there have been significant changes occurred on the Internet. People claim that they are Internet research experts, and they can find anything using their techniques, but nobody knows about the actual information available out there.