ZMap

Fast stateless single-packet network scanner built for Internet-wide surveys of the IPv4 space.

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ZMap is an open-source stateless network scanner for Internet-wide surveys. It can probe the full public IPv4 address space on a single port in well under an hour, with probe modules for TCP SYN, ICMP, DNS, UPnP, BACNET and UDP. It is used by researchers and measurement teams who need large-scale scanning, and pairs with ZGrab 2 for application-layer handshakes.

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