I want to understand how an online port scanner works. How can it detect whether specific ports on my IP address are open or closed? Are there any tools that show both open ports and my public IP address in one place?
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See attached. In 2001, lone wolf terrorist and bioweapons expert Dr. Bruce Ivins, mailed several United States Postal Services (USPS) letters and parcels filed with anthrax spores to news media outlets, democratic senators, and others. This terrorist incident was considered a weapon of mass destruction (WMD) attack, as anthrax is