Nmap, short for Network Mapper, is one of the most used portmapper and network scanning tools. While it is possible to run some of Nmap’s basic functions as an unprivileged/normal user, using most of its advanced features requires root or sudo privileges. For example, some advanced port scanning features like NULL, Stealth SYN Scan, and many others can only work with root privileges because Nmap needs to access raw packet data to give you adequate/usable results. Whenever you try to run such advanced features without sudo privileges, the tool will prompt you with the “requires root privileges” message…. Read more
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