Lockdown2000 is not a credible security application , and it does not meet the majority of its glowing claims . But from the perspective of an unsophisticated user, Lockdown may appear quite credible. Even some computer professionals have failed to see through its facade. Since this misidentification is to the seller's advantage , they appear to have no intention of improving the product's accuracy. This tragically-flawed detection method has been preserved through several version changes.
File size is nowhere near an adequate means of trojan identification.
The size of any program file is easily altered by a variety of means. Trojans are very frequently compressed to render them unrecognizable to virus scanners. Some trojans are even random , a different size every time. Lockdown will sound an alert, leap to the desktop, and declare to its user that it has stopped the attack. In fact these port scans, even when done by serious potential intruders, are harmless unless a trojan is already installed on the machine.