Every computer user knows that there is a certain port scanner program . Interestingly, this knowledge is partly due to fierce competition among the creators of software solutions for protection against viruses. So, early versions of antiviruses from Kaspersky Lab for a session with a global network displayed up to a dozen messages about scanning computer ports (depending on the intensity of work with network resources). In popupit was reported that an attempt was made to scan and the dangerous node was blocked. It is quite clear that users, seeing so many warnings about successful "neutralization", made a conclusion about the high efficiency of the protection program. Fortunately, now this way of attracting attention is almost outdated, and many protective functions work in the background.
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